The interest earned on $\rupee 25000$ in 5 years at simple interest is $\rupee 1500$. What is the rate of interest?

Ravi borrowed Rs. 36000 from Akash at a simple interest of 8% per annum for a period of 4 years. Calculate the amount to be returned by Ravi to Akash after 4 years?

The difference between compound interest and simple interest on a sum for 2 years at 20% per annum, when the interest is compounded annually is ₹32. If the interest were compounded half-yearly, the difference in two interests would be:

Arrange the simple interest of the following cases in decreasing order-

(A) The simple interest on Rs 6600 at 5% per annum for 2 yrs.

(B) The simple interest on Rs 200 at 6% per annum for 5 yrs.

(C) The simple interest on Rs 840 at 5% per annum for 4 yrs.

(D) The simple interest on Rs 5000 at 12% per annum for 2 yrs.

Choose the correct answer from the options given below:

Find the compound interest on Rs. 42000 for $1\frac{1}{2}$ years at 10% p.a. compounded annually.

A certain sum becomes 3-fold at 4% annual rate of interest. At what rate, will it become 6-fold?

The simple interest on Rs 7200 at 14% per annum for 7 years is: