Question

How long will it take rupees 100 to double itself at 5% simple interest

Answer 1

si=prt/100
=100=100×5×t/100
=100=5t
=t=20 yrs
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Answer 2

In 5% interest 100 rupees will double in 20 years
n=100I/Pr
= 100*100/100*5
=20 years is the answer by dividing the step