Question

If a certain amount with simple interest become double in 10 year then what is the rate of interest p.c.p.a?

Answer 1

Let the Principle(P) be X
Then
the Amount(A) =2X
Simple Interest (SI)
=X
Given:
Time(T) =10 years
In case of simple interest
Rate
= ( SI ×100 / P×T)
=( X ×100 / X × 10)
=100/10
=10
Hence the Rate is 10%.
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Answer 2

this might help ok friend