A sum triples in ten years under compound interest at a certain rate of interest, the interest is being compounded annually. In how many years, it would become nine times?

A sum triples in ten years under compound interest at a certain rate o

1.	A sum triples in ten years under compound interest at a certain rate of interest, the interest is being compounded annually. In how many years, it would become nine times?
A.	20 years
B.	30 years
C.	40 years
D.	50 years
Answer» B. 30 years

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A sum triples in ten years under compound interest at a certain rate of interest, the interest is being compounded annually. In how many years, it would become nine times?

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