If a sum of money at a certain rate of simple interest per year doubles in 5 years :

If a sum of money at a certain rate of simple interest per year doubles in 5 years and at a different rate of simple interest per year becomes three times in 12 years, then the different in the two rates of simple interest per year is
(a) 2%
(b) 3%
(c) 10/3%
(d) 13/3%

Anurag Mishra Professor Asked on 19th February 2016 in Maths.
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    Answer: (b) 3%

    Anurag Mishra Professor Answered on 20th February 2016.
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