At simple interest s sum become `49/40` itself in `2.1/2`years. The rate of interest per annum is

At simple interest a sum becomes (49)/(40) of itself in 2 1/2 years. The rate of interest per annum is (a) 7% (b) 8% (c) 12% (d) 9%

At aimple interest a sum become 6/5 of itsself in 2(1)/(2) years. The rate of interest per annum is

At simple interest a sum becomes (49)/(40) of itself in 2(1)/(2) years.The rate of interest per annum is 7%( b) 8%12%(d)9%

At r% per annum a sum become 2 times after 20 years. The rate of interest per annum is :

The simple interest on a sum for 5 years is one fourth of the sum. The rate of interest per annum is

If a sum of money compounded annually becomes 1.44 times of itself in 2 years, then the rate of interest per annum is

A person lent out certain sum on simple interest and the same sum on compound interest at a certain rate of interest per annum. He noticed that the ratio between the difference of compound interest and simple interest of 3 years and 2 years is 16:49. The rate of interest per annum is