If Rs.12,000 earns Rs.7,200 as simple interest over five years at a certain rate, what is the compound interest on the same principal and period at that rate?

Explanation

Given the principal of Rs.12,000 and simple interest of Rs.7,200 over 5 years, the interest rate can be calculated first. Using this rate, the compound interest for 5 years is computed, resulting in Rs.3,052.80, which corresponds to option D.