Question

In how many years will a sum of rupees 6400 compounded semi annually at 5 % amount to rupees 6560

Answer 1

P = 6400

A = 6560

R = 5%

A = P(1 + (R/2)/100)^2n

6560 = 6400(1.025)^2n

6560 = (6560)^2n

Bases are same. Hence,

2n = 1

n = 1/2 years