Question

Babubhai borrows Rs. 4000 and agrees to repay with a total interest of Rs. 500
in 10 installments, each installment being less than the preceding installment by
Rs. 10, what should be the first and the last installment ?
***​

Answer 1

Answer:

Step-by-step explanation:

Let first installment be X then second will X-10

And tenth will be X-90

Sum=X+X-10+X-20.....X-90

=10X-(10+90)9/2

=10X-450

A/Q Sum=4000+500

=10X-450=4500

=10X=4500+450

=>X=4950/10

=>X=495

So first installment is 495

And last installment=495-9×10=405