Question

Suraj invested Rs.1800 in a bank offering 10% compound interest for ‘a’ years. Find the value of ‘a’, if the total interest earned by Suraj from the bank is Rs. 595.8.

• A. 1
• B. 3
• C. 2
• D. 4
• E. 5

Answer 1

The correct option is B 3

Interest earned by Suraj = 1800 × (1 + 0.10)^a – 1800 = 595.8

1800 × (1.1)^a = 2395.8

(1.1)^a = 1.331

(1.1)^a = (1.1)³

a = 3

Hence, option B is correct.