How long will it take for a sum of money to grow from Rs.1250 to Rs.10,000, if it is invested at 12.5% p.a simple interest?

(A) 65 years (X)
(B) 56 years ()
(C) 45 years (X)
(D) 57 years (X)

Answers: How long will it take for a sum of money to grow from Rs.1250 to Rs.10,000, if it is invested at 12.5% p.a simple interest 56 years.