nikhil repays a loan of 3250 by paying rs 20 in the first month and than the increasse the payment by rs15 every month.how long wil it take to clear the loan
So our progression will be
20, 35, 50, ..., 3250
3250= 20+(n-1)15
3250=20+15n-15
3250=15n+5
3245=15n
n= 216 months
= 216/12 = 18 years