Question

    The sum of three numbers is 324. If the ratio of the

    first to the second is 4:5 and that of second to the third is 7:9 then the second number is? 
    A 70 Correct Answer Incorrect Answer
    B 64 Correct Answer Incorrect Answer
    C 105 Correct Answer Incorrect Answer
    D 60 Correct Answer Incorrect Answer

    Solution

    Let the three numbers be A, B and C. Now, A:B = 4:5 & B:C = 7:9 A: B: C = 28:35:45 A+B+C = 324 28k + 35k + 45k = 324 108k = 324 k = 3 Second number = B = 35 x 3 = 105

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