At what rate percent per annum simple interest will a sum double itself in 10 years? (a) 8% (b) 10% (c) 12% (d) `12 1/2%`

At what rate percent per annum simple interest will a sum double itself in 10 years? 8% (b) 10% 12% (d) 12(1)/(2)%

At which rate percent per annum simple interest will a sum triple itself in 16 years? (a) 12% (b) 10.5% (c) 11.5% (d) 12.5%

At which rate percent per annum simple interest will a sum treble itself in 16 years? 12%(b)10.5%11.5% (d) 12.5%

At what rate of simple interest per annum will a sum triple itself in 8 years ? A) 12.5% B) 33.3% C) 10% D) 25%

A sum is lent at 10% per annum.Simple interest willget doubled in how many year?

At what percentage simple interest per annum a certain sum will double in 10 year? A. 7% B. 8% C. 9% D.10 %

The simple interest on a certain sum is (16)/(25) of the sum. If the rate percent annum and the time are numerically equal, then the rate percent is (a) 8% (b) 4% (c) 6% (d) 12%

The simple interest on a certain sum of money at the rate of 5% p.a. for 8 years is Rs 840. At what rate of interest the same amount of interest can be received on the same sum after 5 years? (a) 6% (b) 8% (c) 9% (d) 10%