A man gets a simple interest of Rs 1000 on a certain principal at the rate of 5 p.c.p.a. in 4 years. What compound interest will the man get on twice the principal in 2 years at the same rate? (a) Rs 1000       (b) Rs 1005       (c) Rs 10125 (d) 11025         (e) None of these

What is the simple interest (in Rs) on a principal of Rs 1800 at the rate of 8% per annum for 3 years?

A principal gets increased by 21% in 2 years at compound interest. What will be the simple interest on Rs. 1000 for 4 years at the same rate of interest ?

The simple interest accrued on a certain principal in 5 years at the rate of 12 p.c.p.a. is Rs 1536. What amount of simple interest would one get if one invests Rs 1000 more than the previous principal for 2 years and at the same rate p.c.p.a? (a) Rs 614.40 (b) Rs 845.40 (c) Rs 1536 (d) Rs 2136