The rate of simple interest in percent per annum of a monetary fund is `5%`. If the interest obtained is added to the principal at a regular interval of `10` years, then in how many years `Rs1000` will amount to `Rs2000`?

Find the rate of simple interest in percent per annum if the simple interest of a principal is 3/5 part of the amount in 10 years.

At what rate of simple interest in percent per annum, the ratio of principal and its interest after 20 years is 1:1 ?

If the rate of simple interest in percent per annum of a monetary fund be 8% for the first two years, 8% for the next three years and 10% for the last years, then find the principal, the interest of which in 6 years is Rs1520 .

At the rate of compound interest 5% per annum, find the amount of Rs. 80000 in 2 1/2 years.

At the rate of 8% compound interest per annum, in how many years will Rs. 10000 amount to Rs. 11664?

If the intertest compounded at the interval of 6 months and the rate of compound interest be 5% per annum, then in how years will Rs. 64000 amount to Rs. 68921?

At the same rate of simple interest in percent per annum, if a principal becomes the amount of Rs 1248 in 7 years and or Rs 1056 in 4 years. Find the principal and rate of simple interest in percent per annum.

At the same rate of simple interest in percent per annum, if a principal becomes the amount of 7100Rs in 7 years and of 6200Rs in 4 years. Determine the principal and rate of simple interest in percent per annum.

At the same rate of simple interest in percent per annum, if a principal becomes are amount of Rs 7100 in 7 yrs and of Rs 6200 in 4 yrs, then find the principal and rate of simple interest in percent per annum.

In a bank, principal increases continuously at the rate of 5% per year.In how many years Rs 1000 double itself?