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    Question

    A merchant made a profit of Rs. 600 on selling a gadget.

    Had the cost price been Rs. 400 lower and the selling price Rs. 900 more, the profit would have been 100%. What was the original selling price?
    A 2900 Correct Answer Incorrect Answer
    B 1617 Correct Answer Incorrect Answer
    C 3217 Correct Answer Incorrect Answer
    D 2024 Correct Answer Incorrect Answer

    Solution

    ATQ,


    Let the original cost price be Rs. x.

    Original selling price = x + 600

    New cost price = x - 400

    New selling price = x + 1500

    So,

    2(x - 400) = x + 1500

    ⇒ 2x - 800 = x + 1500

    ⇒ x = 2300

    Original selling price = x + 600 = Rs. 2900

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