How long will it take a sum of money invested at 8% p.a. S.I. to increase its value by 80%?
Choose the correct choice from the following choices
A) 12 years.	B) 11 years.	C) 8 years.	D) 10 years.	E) 9 years.
Sol.   Let the sum be x. Then, S.I. = 80% of x = 4x/5; Rate = 8%.   âˆ´ Time = [100 * 2x/5 * 1/x*8 = 10 years.   Answer 10 years.
<result>D</result>
How long will it take a sum of money invested at 8% p.a. S.I. to increase its value by 80%?