At what rate percent of simple interest will a sum of money double itself in 12 years? `8 1/4%` (b) `8 1/3%` (c) `8 1/2%` (d) `9 1/2%`

At what rate percent by simple interest, will a sum of money double itself in 5 years 4 months ?

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 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%

A sum of money doubles itself in 8 years. What is the rate of interest?

A sum of money doubles itself in 8 years.What is the rate of interest?

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%

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 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%