A sum of money invested at C.I. amounts to Rs. 800 in 3 years to Rs. 840 in 4 years.

A sum of money invested at C.I. amounts to Rs. 800 in 3 years to Rs. 840 in 4 years. The rate of interest per annum is?

Quiz

Answer/Solution

5%

Steps/Work

S.I. on Rs. 800 for 1 year
= (840 - 800) = Rs. 40 Rate
= (100 * 40)/(800 * 1)
= 5%
Answer:C