Questions and answers by

A GOODSTUDENT

Questions (39)

In a Young's Double Slit experiment, the separation of four bright fringes is 2.5mm, the wavelength of light used is 6.2*10^-7m.
1. 3 answers
2. 853 views
In a Young's Double Slit experiment, the separation of four bright fringes is 2.5mm, the wavelength of light used is 6.2*10^-7m.
1. 3 answers
2. 2,797 views
One ship, sailing east with a speed of 7.5 m/s, passes a certain point at 8A.Mand a second ship sailing north at the same speed,
1. 5 answers
2. 2,351 views
A dealer gains a selling price of 4 watches by selling 20 watches. What is the percentage of profit?
1. 6 answers
2. 4,140 views
The product of numbers3^(1/3).3^(1/9).3^(1/27)...... To infinity is A.3 B.3^(1/3) C.3^(1/2) D.3√3
1. 4 answers
2. 565 views
A ball is dropped from a height of 20 meter and rebounded with a velocity which is 3/4 of the velocity with which it hits the
1. 1 answer
2. 383 views
Two trains are running on parallel tracks., train A is faster than B.There is a box on each train of identical nature. But mass
1. 1 answer
2. 452 views
If a stone is thrown with velocity 10 m/s. How high will it reach after 10 s. Take g = 10 m/s^2I want to know if this question
1. 3 answers
2. 383 views
1-By opening the door of a refrigerator ehich is inside a room, the temperature of the room :A) decreases B) increases C)
1. 4 answers
2. 609 views
please help me with this question. I just can't figure it out.A cylindrical jar of radius 6cm contains water. How many iron
1. 1 answer
2. 482 views
IF(1/SinA)+(1/cosA)= (1/sinB)+(1/cosB) Prove that cot((A+B)/2)=tanA tanB Please helppppppppppp
1. 1 answer
2. 796 views
If x+y=45°, prove that{(cotx+1)(coty+1)}/{cotx×coty}=2 Please help me in this TRIGONOMETRY problem. From the topic -
1. 6 answers
2. 4,072 views
Ben buys some oranges at the rate of 10 per $. He also buys equal number of oranges at the rate of 12 per $. He mixes them
1. 3 answers
2. 466 views
Find the equation of the straight line passing through the point(3,-2) and making an angle of 60° with the line√3x+y-1=0Plzz
1. 2 answers
2. 552 views
I was solving a problem. InIt r have been given that two lines are perpendicular to each other The equation of one line
1. 3 answers
2. 787 views
Solve (0<=©<=360). ©Represents thetatan©+tan2©+tan3©=0 Please help
1. 3 answers
2. 474 views
This was a question asked in our last testEither of her eyes --------- not work well. (Do, does, is) I answered 'do' but some of
1. 4 answers
2. 616 views
A flagstaff of placed at one corner of a rectangular playground 40m long and 30m wide. If the angle of elevation of the top of
1. 5 answers
2. 2,303 views
Who are gaochos?
1. 4 answers
2. 325 views
2 boys and 5 girls can finish a piece of work in 4 days. 4 boys and 4 girls can finish the same work in 3 days. If a girl is
1. 4 answers
2. 561 views
2 boys and 5 girls can finish a piece of work in 4 days. 4 boys and 4 girls can finish the same work in 3 days. If a girl paid
1. 2 answers
2. 542 views
The total price of a mobile and a watch is rs8000.If 10% discount and 10% VAT IS imposed on both, their selling price becomes
1. 3 answers
2. 530 views
A and B play card on stake. A gains from B1/4 of the latter's money. B gains from A 1/3 of A's original money. Each has now rs
1. 3 answers
2. 513 views
The tip of a plant was 6cm above a lake but a sudden wind forced the plant to move 10 cm fat from its original position and then
1. 1 answer
2. 453 views
sqrt(1+x) -sqrt(1-x) = sqrt (1-x-sqrt(1+x))Please help This question is..... . . √(1+x) - √(1-x) = whole root under OR
1. 4 answers
2. 479 views
Which word is correct to use? Math or Maths?
1. 4 answers
2. 419 views
You had helped me with a similar question.This one says : A whole seller supplies 90 books while he was ordered to send 80 books
1. 3 answers
2. 820 views
You had helped me with a similar question.This one says : A whole seller supplies 90 books while he was ordered to send 80 books
1. 2 answers
2. 582 views
A manufacturer offers a20% rebate on the marked price of a product. The retailer offers another 30%rebate on the reduced price.
1. 3 answers
2. 641 views
When a student added Zinc granules to dilute HCI, a colorless and odorless gas was evolved, which was tested with a burning
1. 3 answers
2. 854 views
Rama and Radha each had a set of marbles . rama said to radha 'if you give me 10 of your marbles then i shall have twice as many
1. 1 answer
2. 412 views
A shopkeeper mixes two types of milk costing rs 25per litre and rs 30per litre. if he sells 60litres of mixture for rs 1600,
1. 2 answers
2. 571 views
Out of group of goats,Two times the square root of the number of goats were kept in shade, 1/4 of the number were taken for
1. 3 answers
2. 479 views
A piece of stone loses its 1/5 th of weight when it is weighted in water and a piece of iron loses 1/10th of its weight under
1. 1 answer
2. 514 views
while paying a bill a man paid $189.80 as the amount of VAT at 13%. how much was the actual bill amount?Plzz help Should i
1. 1 answer
2. 502 views
A dishonest shopkeeper has 2 false balances. One balance weighs 10 %more while buying goods and other weighs 10% less while
1. 7 answers
2. 1,451 views
What is the difference between a hydrogen filled balloon and an air filled balloon moving in air?please answer. THe question is
1. 2 answers
2. 618 views
Why is glass considered as a supercooled liquid? answer please!!!
1. 1 answer
2. 344 views
What is the difference between a hydrogen filled balloon and an air filled balloon moving in air?
1. 1 answer
2. 468 views

Answers (60)

I am titally lost in this question and have absolutely no idea. Is there some rule or particular formula of solving such questions?
l=2w-----1 2{(l+4)+(w-1)}=198-----2
Thank you very much DrBob222
-5(2a+5) is the one for 3
True solution 1. Sucrose dissolved in water 2. Salt solution 3. Lemon juice 4. Urea in water 5. Acetic acid in water 6. Copper sulphate in water 7. All ionic compounds in water 8. Ethanol in water 9. Glucose dissolved in water 10. Air Could've googled
Am pretty sure that his auto correct is to blame for this.😞😃😞
While checking it should've been 0.75(-800-24)+400=-182
Is it paining? And ur choice is...? How about using brackets and commas for the options?????
19 Hmmmmm very similar to what I did when I was here first time
I will write a simple qbasic program (u make algorithm yourself) CLS for I =2to 20 step 2 Print I Next I End
'the' not 'he'
'Rather strange people' lol
Ahh !😊 Now I get it. Thanks
How about using some parentheses in posting questions
Ahh interchange of coefficients of x and y and sign change of y Now I get it
Exterior angle of a triangle of the sum of two opposite interior angles. So I see a typo in your question The way to do this is Exterior angle= two opposite interior angle s Or exterior = x+ another interior Find x And then X+ another interior+ y= 180
Thanks
You took 10 as LCM for the first two terms but the second term is negative In your second step you have taken a positive sign Second step must be (3-1)/10
Assuming that you meant z=x+(y/2) Or z-x =y/2 Or 2(z-x)=y Otherwise it you meant z=(x+y)/2 Or x+y= 2z Or y= 2z-x
I don't see any way to solve this one. And you have 3 boxes and all options are odd numbers and you have an even number on the RHS PROBABLY THERE IS SOME TECHNIQUE Or you need to some smartness here 3 factorial gives 6 so 1 solution that I see here is
3 - wrong 4-wrong again You need some practice with this -20/-10 For your ease Eliminate the negative signs coz - divided by- is plus Now cut the two zeros The you have 2/1 And answer is 2 Try 4 yourself
1-. 87-396 gives a negative value. 2-. Yes 3-. No negative value divided by another negative value gives a positive value 4-. Both your selections are wrong You can type the problems on Google or on a calculator to check them.
Oh did I type I answered do? I am sure I answered does and my friend s said do That was a brain fade. Typo
Thank you so much. Now I got some relief.
Oh so u used Pythagoras theorem for the diagonal. Thank you
From 1 X-y=5 Or x= 5+y Putting value of x(ie - 5+ y) in eqn. 2 5+2y =7 Or y=(7-5)/2 Solve for y and put the value of y in equation 1
I know I can't help you but Is this the nikhil-jain riddle ( like the 'Einstein's riddle') And who gives such large questions. And what about grammar and punctuation. And I don't see a question there. It seems as if it's a paragraph and there is no
According to my text - gaucho's are the cowboys of Argentina who look after the cattle in the pampas AM I RIGHT???
Google says 145.2
Let your age(not mine) be x 4(x-6)-x=10
Suppose I am 20 yrs old Then 25*2=50-10=40/2=20 My age again. Don't look the solution I have broken maths there with those equal to signs
Look subject
Well I have no idea how I got 4 there. I meant 3
Let numerator be x and denominator be y Fraction is x/y 1st case x+1/y+1 = 3/4 2nd case. X-3/y-4= 1/2 Solve for x and y
I think reiny already answered the same question. Look at related questions below
Thanks allot. that helped a lot . I hadn't even understood latter half of the question so this helped a lot
Correct
I meant 'if a girl is paid rs 750......'
Thanks a lot
Na! I checked out twice. Nothing extra is given. So it is perhaps one of those types!
How about cos inverse(200) Is this correct
But how did you get +√1.5 it's-√1.5 But still according to you the question is incomplete. However if x=0 then you would get a true equation. But how do I solve it to get even at least 0
Length = 2* width Let length be l and w be the width Then 2(l+w)=126 2(3w)=126 W=126/6 Find out what you want to find. And please type the full question. That one seems to be just a statement.
Digits be x and y and number is 10x+y xy=24 (assuming you meant the product of the digits) And second equation is 10y+x-(10x+y) = 27 Take over
Look related questions below and it is better that you Google such questions
I am a part of history
I reckon the book has a misprint answer because, my friends said that they had the same concept and had done the solution the same way. Thanks for the help any way reiny. And anyway I am from Nepal not USA.
3cos@=1 Cos@ = 1/3 Sec@ = 1/(1/3) Sec@ = 3
Collect more sunlight
Area = l*w So let width be w and length be w+6 Noe equation is B(B+6) = 72 Solve for B and find the answer

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