A sum of money becomes triple itself in 16 years. In how many years will it become 5 times at the same rate?  Choose the correct answer:
A) 32
B) 15
C) 27
D) 30
E) 35
Let sum be Rs.100. After 16 years it become 300. With in 16 years it increased Rs.200 i.e. after 8   years it is doubled. So after 32 years interest become Rs.400. Total Rs.500 i.e. 5 times more than the   sum. So 32 years is the answer.   32NSWER:32
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A sum of money becomes triple itself in 16 years. In how many years will it become 5 times at the same rate?