Question

MALU EARNS rs5 MORE IN A WEEK THAN IN PRECEEDING WEEK.HE EARNED rs135 IN FIRST WEEK.HOW MUCH WILL HE EARN AT THE END OF 39th WEEK??

Answer 1

135 + 38*5

Answer 2

nooo

8970 is the answer...but i dont know how???

Answer 3

oops. My answer was the amount earned in the 39th week. To find how much he has earned during the whole 39 weeks, use the sum formula:

S39 = 39/2 (2*135 + 38*5) = 8970

Answer 4

thank u