# CBSE Class 7 Answered

**In how much time will a sum of money double itself if invested at 8% simple interest per annum?**

Asked by Trisha Gupta | 13 Mar, 2020, 11:02: AM

Expert Answer

Let the sum invested be Rs. x.

Amount will be A = 2x

Simple interest = 2x - x = x

SI = PNR/100

x = x × N × 8/100

N = 12.5 years

In 12.5 years time will a sum of money double itself if invested at 8% simple interest per annum.

Answered by Sneha shidid | 13 Mar, 2020, 11:12: AM

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