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Balaji
Questions (8)
In an arithmatic sequence, sum of 9 terms is 279 and sum of 20 terms is 1280.
Find 5th term ? Find 16th term ? Write the
2 answers
3,111 views
I have 50.00
SPEND BALANCE 20.00 30.00 15.00 15.00 9.00 6.00 6.00 0.00 ------- -------- TOTAL 50.00 51.00 How the difference
1 answer
331 views
a reduction of 20% in the price of sugar enables a purchaser to obtain 2.5 kg more for Rs.160.find the original rate and the
1 answer
542 views
a reduction of 20% in the price of sugar enables a purchaser to obtain 2.5 kg more for Rs.160.find the original rate and the
1 answer
592 views
A man travels for 5 hr 15 min if he covers the first half of the journey at 60 kmph and the rest at 45 kmph. find the total
1 answer
494 views
without stoppage a train travels a distance with an average speed of 60 km/hr and with stoppage it covers the same distance with
1 answer
531 views
in a school there are 15 more boys than girls. if the number of boys is increased by 20% and the number of girls is increased by
1 answer
429 views
if body having initial velocity of 10m/s moves with a uniform acceleration 10m/s then the final velocity when it covers a
1 answer
544 views
Answers (3)
Super
S9 = 279 F5 = 279/9 = 31 S20 = 1280 S20-S9 = 1280-279 =1001 =[sum of F11 to F20] F15 =1001/11 = 91. F15-F5 = 91-31 = 60 = 10 d d = 60/10 = 6 F16 = 91 + 6 =97 F1 =31-4d =31-24= 7 so, 7,13,19,25,..........
Join the centers of the 3 triangles to form an equilateral triangle with sides length 20. The area enclosed by the 3 triangles will be the area of this triangle minus the area of 3 sectors of the circles with central angles of 60 degrees. Thus the area of
