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    Question

    If a sum becomes 4 times in 20 years what is the rate of

    simple interest given?
    A 15% Correct Answer Incorrect Answer
    B 20% Correct Answer Incorrect Answer
    C 13(1/3)% Correct Answer Incorrect Answer
    D 10% Correct Answer Incorrect Answer

    Solution

    Let the sum be Rs. 1 The sum become after 20 years = 4 × 1 = Rs. 4 SI=4-1= 3 As we know, SI = Prt/100   3 = (1 x r x 20)/100 r = 3 x 5 r = 15%

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