A sum of money is doubled in 8 years at r% rate ofcompound interest per annum. At the same rate inhow many years it will be four times of the sum ?

Answer the followings questions (any ten) : A sum of money is doubled in 8 years at r% rate of compound interest per annum. At the same rate in how many years it will be four times of the sum?

A sum of money doubles itself in 8 years. What is the rate of interest?

A sum of money doubles itself in 8 years.What is the rate of interest?

If a sum of money at simple interest doubles in 12 years, the rate of interest per annum is

A certain sum of money will be doubled in 15 years at the rate of simple interest percent per annum of

A sum of money becomes 2-times at the rate of compound interest in 15 years. In how many years, it will becomes 8 times at the same of compound interest?

a. A sum of money doubles itself in 4 years at a certain rate of interest. In how many years will it triple itself at the same rate of interest ? b. A sum of money trebles itself in 6 years at a certain rate of interest. In how many years will it become four times itself at the same rate of interest ?

A sum becomes 14 times of itself in 15 years at the rate of simple interest per annum. In how many years will the sum becomes 92 times of itself?