If the simple interest for 6 years be equal to 30% of the principal, it will be equal to the principal after (a) 10 years       (b) 20 years     (c) 22 years     (d) 30 years

If the simple interest for 5 years be equal to 25% of the principal, it will be equal to the principal after

Rs 1000 is invested at 5% per annum simple interest.If the interest is added to the principal after every 10 years,the amount will become Rs 2000 after (a) 15 years (b) 16(2)/(3) years (c) 18 years (d) 20 years

Simple interest on a certain amount is (9)/(16) of the principal.If the numbers representing the rate of interest in percent and time in years be equal,then time,for which the principal is lent out,is 5(1)/(2) years (b) 6(1)/(2) years (c) 7 years (d) 7(1)/(2) years

The simple interest on a sum of money is of the principal and the rate percent is equal to number of years.The rate percent is

Simple interest on Rs500 for 4 years at 6.25% per annum is equal to the simple interest on Rs 400 at 5% per annum for a certain period of time.The period of time is (a) 4 years (b) 5 years (c) 6(1)/(4) years (d) 8(2)/(3) years