1.  There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of Rs. 12,000 after 3 years at the same rate? 

Answer: Option C Explanation: Let P = Rs. 100. Then, S.I. Rs. 60 and T = 6 years.
Now, P = Rs. 12000. T = 3 years and R = 10% p.a.
