Question

a man repays a loan of 3250 by paying 20 in first month and then increase the payment by 15th every month how long will it take him to clear the loan​

Answer 1

a=20

d=15

sum of amount=3250

n/2(2*20+(n-1)*15)=3250

n/2(15n+25)=3250

15n**2+25n=6500

3n**2+5n-6500=0

(n-20)(3n+65)=0

n=20 or n=-65/3

Hence the loan is cleared in 20months.

if you find the above answer correct and method easy please rate the question also follow me. Please also leave a comment