If S.1 is Rs 31.50, time period is `1 1/4` years and rate of interest per annum is `5 1/4 %` then the principal is.

The simple interest on Rs 100 for 4 years at 5 % per annum is

Total interest of Rs 400 for 2 1/2 years at the rate of 6% simple interest per annum is

The interest on Rs 1,250 for 15 years at the rate of 1.6% simple interest per annum will be:

Interest on Rs. 1200 for 1""1/2 years at the rate of 15% per annum is Rs. 180.

If a principal beocmes Rs 560 in 3 years and Rs 600 in 5 years at the same rate of simple interest in percent per annum, then find the principal and the rate of simple interest in percent per annum.

The simple interest of a principal in 1 year and 9 months at the rate of simple interest of 5% per annum is 63Rs more than of the same principal in 2 years and 4 months at the rate of simple interest of 4(1)/(2)% per annum. Find the principal.

P= Rs. 6000, A= Rs. 6660 and the time period is 1 year. Find the interest and the rate of interest per annum.

The simple interest of a principal increases by Rs42.50 when the rate of simple interest per annum increases from 7% to 7(1)/(2)% . Find the principal.

With a given rate of simple interest, the ratio of principal and amount for a certain period of time is 4 : 5. After 3 years, with the same rate of interest, the ratio of the principal and amount becomes 5: 7. The rate of interest per annum is