Vivek

This page lists questions and answers that were posted by visitors named Vivek.

Questions

The following questions were asked by visitors named Vivek.

A car reaches a speed of 40m/s from rest in a time of 8 seconds. After the 8 seconds, the car travels at a constant velocity fro 200meters when it runs out of gas. The car slowly comes to rest 30 seconds after running out of gas. Calculate acceleration fo...

What is force defin it

The earth's atmosphere extends to a height of nearby 200KM above its surface there many be explosion and noises taking place in the outer space but we do not hear them.why?

What is comet how it fall and why he look blue

The size of a red blood cell is 0.000007 m and that of a plant cell is 0.00001275 m.Show that a red blood cell is half of plant cell in size

The inner circumference of a circular track is 220 m.The track is 7 m wide everywhere.Calculate the cost of putting up a fence along the outer circle at the rate of $2 per metre.

A steamer goes downstream and covers the distance between two ports in 4 hours while it covers the same distance upstream in 5 hours.If the speed of the stream is 2 km/h.Find the speed of steamer in still water.Check your solution.

The diameter of Sun is (1.4 ×10^8)m and the diameter of Earth is (1.2742×10^4)m . Show that the diameter of sun is nearly 100 times the diameter of Earth.

Oranges are bought at 6 for Rs 10 and sold at 4 for Rs 9. Find the gain% or loss%.

Mass of Earth is (5.97×10^24)kg and Mass of Moon is (7.35×10^22)kg.What is the Total mass of the two?

In a Library stack there are 4 books each of thickness 24 mm and 6 paper sheets each of thickness 0.015 mm. What is the total thickness of the library stack in scientific notation?

In the pie chart representing the percentages of students having interest in reading various kinds of books,the central angle of the sector representing students reading novels 81°. What is the percentage of students interested in reading novels?

In what time will Rs 1000 amount to Rs 1331 at 10% per annum, compounded annually?

In a experiment the count of bacteria was increasing at the rate of 2.5% per hour. Initially, the count was 512000.Find the bacteria at the end of 2 hours?

The value of a machine depreciates every year by 10%.If the present value of the machine is Rs 54000,what was its value last year?

If 5 men or 7 women can earn Rs 875 per day.how much would 10 men and 5 women earn per day?

The rates of working of A and B are in the ratio 3:4.Find the number of days taken by them to finish the work?

Prove that the sum of the angles of Quadrilateral is 360°.

Prove that the sum of the angles of Triangle is 180°.

How to find the sum, without adding? (1)(2+4+6+8+10) (2)(1+3+5+7+9+11+13) (3)(2+4+6+8+10+12+14+16+18+20)

Solve and check the result.3(5x-7)-2(9x-11)=4(8x-13)-17

given f(x)= 5x+4/5x^2+4x and g(x) = 1/x simplify f(x) and find any vertical asymptotes

Ravi owns a plot of rectangular shape.He has fenced it with a wire of length 750 m.The length of the plot exceeds the breadth by 5 m. Find the length and breadth of the plot.

A sum of Rs 8400 is made up of 50,20,10 and 5 rupee notes.The number of 10 rupee notes is five times the number of 5 rupee notes, four times the number of 20 rupee notes and ten times the number of 50 rupee notes.What is the number of notes in each denomi...

In a hostel,50 kilogram milk are consumed everyday.If each student gets 400 gram of milk per day,find the number of students who take drinks in the hostel.

Half of a herd of deer are grazing in the field and three-fourths of the remaining are playing nearby.The rest 9 are drinking water from the pond.Find the number of deer in the herd.

A period of 4 hours and 30 minutes is what per cent of a day?

A field in the form of a parallelogram has base 15 dam and altitude 8 dam.Find the cost of watering the field at the rate of 50 paise per square metre???????Please help to solve this????????????????

Due to an increase in the price of sugar by 25%,by how much percent must a householder decrease the consumption of sugar so that there is no increase in the expenditure on sugar?

Prove that the area of a circular path of uniform width h surrounding a circular region of radius r is pi h (2r+h)

An ox in a oil processing apparatus is tethered to a rope 3m long .How much distance does it cover in 14 rounds?

Q1(a)-How to draw the graph of the function A=x^2. Q1(b)-From the graph, How to find the value of A,when (i)x=2 (ii) x=3 (iii)x=4

Syed's income is 25% more than that of Emraan.How many per cent is Emraan's income less than that of Syed?

(1)Emraan income is 25% more than that of Syed. How many per cent is Syed's income less than that of Emraan? (2)Ram's income is 20% more than that of Lakshman. How many percent is Lakshman's income less than that of Ram? (3)Hero's income is 20% less than...

(1) 11×10^-5 .Express it in scientific notation. (2)The distance between sun☉ and earth🌎 is (1.496×10^11)m and the distance between earth 🌎 and moon 🌙 is (3.84×10^8)m.During solar eclipse moon comes in between earth and sun.At that time what is the dis...

The length and breadth of a park in the ratio 2:1 and its perimeter is 240 m. A path 2m wide runs inside it,along its boundary.Find the cost of paving the path at Rs 80 per square metre?

Find the percentage of pure gold in 22-carat gold, if 24-carat gold is 100% pure gold.

a stone mass of 2.5kg is falling a certai height. Find the force of attraction between the earth and the stone. Also find its acceleration

A rectangular Park of length 80m and width 65m has two paths of uniform width 2.5m crossing each other. Find the area of remaining portion.

metrix method solve equation 2x-y-3z=9 ,x+y+z=6 ,x-y+z=2

3ROH+PX3 -......…...+...........

Answers

The following answers were posted by visitors named Vivek.

300 cos 35.2 - Fk = ma fk = 300 cos 35.2 - ma Fn = mg + 400 sintheta = 300 + 400 sin 35.2 Fk = Fn*uk uk = 0.57 300 cos 35.2 - ma = 0.57 [ 300 + 400sin 35.2] -ma = (0.57)[300+400sin35.2]- [300 cos 35.2] a = all that crap on the right side/ (300N/0.9) a = 0...

The capacity do to work

Let the inner and outer radii of the circular track be R metres and m metres respectively.Then,Inner circumference=220 metre (Use pi= 22/7) 2piR=220 2×22/7×R=220 R=35 m Since the track is 7 metre wide everywhere. m=Outer radii = R+7 = (35+7)m=42 m Outer c...

Decimal form of 5/8 = 0.625 Decimal form of 4 5/8 = 0.625+4 =4.625 HENCE DECIMAL FORM OF 4 5/8 is 4.625.

This is a right triangle.