The ratio of the interest accured on a sum, when invested at simple in – InterviewSolution

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1.	The ratio of the interest accured on a sum, when invested at simple interest for 2 years and the interest accured on it, if it is invested at compound interest, interest being compounded annually for 3 years at the same rate of interest is 50:91. Find the rate of interest (per annum).
Answer» <P> Solution :i) Find the ratio of SI foryears and CI for 3 years and EQUATE it to the given ratio. ii) `(P xx r xx 2)/100 /P[(1+r/100)^(3)-1]=50:91`. iii) Solve the above and find r.

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