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    Question

    Three warehouses store goods in the ratio 7:5:6. When 10

    more units are added to each, the ratio becomes 9:7:8. What was the original total quantity of goods stored?
    A 66 Correct Answer Incorrect Answer
    B 90 Correct Answer Incorrect Answer
    C 70 Correct Answer Incorrect Answer
    D 64 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the initial quantity in the three warehouses be 7x, 5x, and 6x. According to the question: (7x + 10):(5x + 10) = 9:7 ⇒ 7(7x + 10) = 9(5x + 10) ⇒ 49x + 70 = 45x + 90 ⇒ 4x = 20 ⇒ x = 5 Total initial quantity = 7x + 5x + 6x = 18x = 90

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