Question

a sum of Rs 7260 is paid off in 20 installments such that each installments is Rs 20 more than preceding installments. calculate the value of the first installment.

Answer 1

Here is your Answer :-

Let first installment be Rs. x
Then,
A.T.Q.
x + (x+20) + (x+40) + (x+60) +
(x+80) + .....(x+380) = Rs.7260

=> 20x + (20+40+60+80...+380) = 7260
=> 20x + 3800 = 7260
=> 20x = 7260 - 3800
=> 20x = 3460
=> x = 3460/ 20
=> x = 173

Your Answer => First Installment, x = Rs.173

Hope it helped you.