In the following question, two statements are numbered as A and B. On solving these statements, we get quantities A and B respectively. Solve both quantities and choose the correct option.

Quantity 1: Rs.24,000 amounts to be Rs.41,472 in 3 years at r% p.a. of compound interest. What is the value of r?

Quantity 2: A sum of money become 8 times itself in 3 years compounded annually find rate of interest.