How long will it take a sum of money invested at 5% p.a. S.I. to increase its value by 50%?	Pick one
A) 10 years.  B) 4 years.  C) 8 years.  D) 12 years.  E) 14 years.
Sol.   Let the sum be x. Then, S.I. = 50% of x = x/2; Rate =5%.   âˆ´ Time = [100 * x/2 * 1/x*5] = 10 years.   10 years.nswer 10 years.
<result>A</result>
How long will it take a sum of money invested at 5% p.a. S.I. to increase its value by 50%?