In what time will the simple interest be 2/5 of the principal at 8 per cent per annum?
Choose the correct answer.
A) 8 years  B) 7 years  C) 6 years  D) 5 years  E) 4 years
Explanation:   Let sum = x.   Then, Amount =2/5 x ,R=8% pa   Here, S.I = 2/5 of sum   Time =( 100 X 2x/x X 5 X 8) = 5 Years   Answer: 6 years
<result>C</result>
In what time will the simple interest be 2/5 of the principal at 8 per cent per annum?