Question

A sum of money amounts to rupees 9440 in 3 years if the rate of interest is increased by 25% the amount becomes 9800

Answer 1

Principle Rs 8000

Interest Rate = 6%

Let Principle be P and rate is R

Equation 1 = P + (P x 3 x R/100) = 9440

Equation 2 = P + (P x 3 x (R x 1.25)/100) = 9800

by solving these equation we get  

P = 8000

R = 6