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    Question

    A invested Rs.600 at r% rate of simple interest for 20

    months while B invested Rs.900 at 16% rate of simple interest for r months. If they together received Rs.308 as interest, then find the value of 'r'.
    A 12 Correct Answer Incorrect Answer
    B 16 Correct Answer Incorrect Answer
    C 14 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer
    E 18 Correct Answer Incorrect Answer

    Solution

    Simple interest = sum * rate * time/100
    308 = 600 * r * (20/12)/100 + 900 * 16 * (r/12)/100
    308 = 22r
    r = 14

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