With what rate of simple interest (annual) asum becomes 4 times in 15 – InterviewSolution

1.

With what rate of simple interest (annual) asum becomes 4 times in 15 years?

Answer»

Let the sum be x and rate be r%

then, (x*r*15)/100 = 3x

=> r = 20%

[Important to note here is that simple interest will be 3x not 4x, because 3x+x = 4x]

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