A certain quantity of money becomes three times in `20` years , then at the same rate of interest in how many years it will become double?

If a principal becomes twice of it in 10 years then the rate of simple interest is ______

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?

In a bank if 4750Rs is deposited in simple interest, it becomes an amount of 6650Rs after a period of time of 4 years. According to the same rate of interest, in how many days 85000Rs will amount 106250Rs ?

At a ceratain rate of compound interest if a sum of money becomes double in n years then find the period of time in which it will become 4-times.

If a principal becomes dublein 10 years. Then the rate of simple interest in prescent per annum will be

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?

The amount of ₹ a in 20 years at the rate of simple interest of a % per annum is ………………

A sum of money becomes 2 1/2 times after 6 years at a certain rate of compound interest per annum, then how much time will the sum of money become after 18 years?