A sum of Rs.800 is invested for 3 years at simple interest rate. The rates of interest for the 3 years are 6%, 8% and 10% per annum. Find the total amount of interest earned at the end of 3 years.

Correct option is D

Given:

Principle = ₹800

Interest for three years = 6%,8% and 10%

Formula Used:

​$$SI=\frac{P \times R \times T}{100}$$​​

Solution:

SI for 3 years = SI for first year + SI for 2^nd year + SI for 3^rd year

​$$=\frac{800 \times 6 \times 1}{100}+\frac{800 \times 8 \times 1}{100}+\frac{800 \times 10 \times 1}{100}$$​​

=48 + 64 + 80

= ₹192