Question

in how much time will a sone of money double if invested at the rate of 8% simple interest per annum
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Answer 1

Answer:

Let sum of money=Rs. x

Therefore amount=Rs. 2x

Interest=sum∗time∗R/100

=x∗time∗8/100

=8x∗time/100

Amount=sum+interest

2x=x+8x∗time/100

2x=100x+8x∗time/100

200x=100x+8x∗time

100x=8x∗time

time=100x.

time=12.5years.