RRB Government Jobs Exams

A sum of money is doubled in 3 years at C.I. compounded annually. In how manyyears will it become 4 times?

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9 years.. as 2^2=4 : 3^2=9
11 years agoHelpfull: Yes(0) No(0)

RRB Other Question

What rate of C.I for a sum of Rs.6000 will amount to Rs.6720 in 2 years if theinterest is calculated every yea x decides to deposit Rs.500 at the end of every year in a bank which gives 8% p.a. C.I. If the installments are allowed to accumulate, what amount he willreceive at the end of 7 years