Question

At some rate of simple interest, a sum becomes Rs.1200 in 2 years and Rs.1500 in 4 years. The rate of interest is

options-
12.5%
16.67%
15%
18%

Answer 1

12.5% . Hopefully it helps you to find your answer.

Answer 2

Answer:

16.67%

Step-by-step explanation:

Find the interest earned in 2 years:

At the end of 2 years = Rs 1200

At the end of 4 years = Rs 1500

Interest for 2 years = 1500 - 1200 = Rs 300

Find the interest earned for 1 year:

2 years = Rs 300

1 year = 300 ÷ 2 = Rs 150

Find the principal amount:

At the end of 2 years = Rs 1200

Interest per year = Rs 150

Principal = 1200 - 150 - 150 = Rs 900

Find the interest rate:

Interest rate = 150/900 x 100 = 16.67%

Answer: 16.67%