A sum because its double in 10 years. Find the annual rate of simple interest. (a) 8%         (b) 5%         (c) 10%          (d) 20%

In how many years any amount will be doubled at rate of 10% simple interest annually?

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%

The simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs 4000 for 2 years at 10% per annum.The sum placed on simple interest is (a) Rs 1550 (b) Rs 1650 (c) Rs 1750 (d) Rs 2000

Simple interest on a certain sum at a certain annual rate of interest is (1)/(9) of the sum.If the numbers representing rate percent and time in years be equal,then the rate of interest is 3(1)/(3)% (b) 5% (c) 6(2)/(3)% (d) 10%

A person deposited Rs 400 for 2 years, Rs 550 for 4 years and Rs 1200 for 6 years. He received the total simple interest of Rs 1020. The rate of interest per annum is (a) 5% (b) 10% (c) 15% (d) 20%

A sum of money at a simple rate of interest i_(1) doubles in 5 years.At another simple rate of interest i_(2), it becomes three xx in 12 years. Then,the two rates of interest i_(1) and i_(2) respectively are 10%,16(2)/(3)% (b) 10%,120% (c) 20%,116(2)/(3)% (d) 20%,130%

A lent Rs 5000 to B for 2 years and Rs 3000 to C for 4 years on simple interest at the same rate of interest and received Rs 2200 in all from both of them as interest. The rate of interest per annum is (a) 5% (b) 7% (c) 7 1/8% (d) 10%

1.080 invested for 3 months gave an interest of 0.027. The simple rate of interest per annum was : (a) 2.5 % (b) 5% (c) 7.5% (d) 10%