Determine the rate of interest for a sum that `343/216` times itself in 3 years interest com-pounded annually.

Determine the rate of inerest for a sum that becomes (343)/(216) times itself in 3 years interest compounded annually.

The rate of interest for a sum that becomes (729)/(576) times itself in 2 years, when compounded annually, is

Find the rate at which a sum of money will double itself in 3 years, if the interest is compounded annually.

Find the rate at which a sum of money will double itself in 3 years, if the interest is compounded annually.

Find the rate at which a sum of money will double itself in 2 years,the interest is compounded annually.

At what rate of interest per annum will a sum double itself in 8 years ?

Find the rate of simple interest per annum. If the sum borrowed becomes 3 times itself in 12 years.