Question

12. The ratio of the interest accrued on a sum, when
invested at simple interest for 2 years and the
interest accrued on it, if it is invested at com-
pound interest interest being compounded
annually for 3 years at the same rate of interest is
50 : 91. Find the rate of interest (per annum).
(a) 10%
(b) 15%
(c) 25%
(d) 20%​

Answer 1

Answer:

D

Step-by-step explanation:

(i) Find the ratio of SI for years and CI for 3 years and equate it to the given ratio. <br> ll)

P X r X 2 / P [ 1 + r ) 3

________ ______ -1] = 5

100 100