If the compound interest of a certain sum of money for two successive years be TK. 225 and Tk. 238.50 . What is the rate of interest per annum?
A
5%
B
7%
C
10%
D
6%
Correct Answer: 6%
Profit = 238.50 - 225 = 13.5 1 = 13.5225100 = 13.5225×100 = 135×100225×10 = 6%