The difference between CI and SI on Rs. 8400 for 2 years at 5% is: MCQ with Answer and Explanation

Explanation:
Difference for 3 years = P * (R/100)^2 * (3 + R/100) => 124 = P * (10/100)^2 * (3 + 10/100) => 124 = P * (1/100) * (3.1) => 124 = P * 0.031 => P = 124 / 0.031 = Rs. 4000.

Explanation:
The sum becomes 2^1 times in 5 years. It will become 128 (2^7) times in 7 * 5 = 35 years.

Explanation:
Difference for 3 years = P * (R/100)^2 * (3 + R/100) => 217 = P * (10/100)^2 * (3 + 10/100) => 217 = P * (1/100) * (3.1) => 217 = P * 0.031 => P = 217 / 0.031 = Rs. 7000.