If the simple interest on a sum of money for 2 years at 5% per annum is Rs. 50, what is the compound interest on the same at the same rate and for the same time?

Answer: Option A

Explanation:

Sum = Rs.		50 x 100		= Rs. 500.
		2 x 5

Amount

= Rs.		500 x		1 +	5		2
					100

= Rs.		500 x	21	x	21
			20		20

= Rs. 551.25

C.I. = Rs. (551.25 - 500) = Rs. 51.25