Question

in what time will a sum of rs3750 at 20% per annum compounded annually amount
to rs6480

Answer 1

A= 6480, P= 3750, r= 20%, n=?(in superscript)

A= P(1+r/100)^n

6480 = 3750(1+20/100)^n

6480/3750 = (120/100)^n

216/125 = (6/5)^n

(6/5)^3 = (6/5)^n

Thus, n=3 years