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Discussion :: Ratio and Proportion

  1. The price of silver-biscuit is directly proportional to the square of its weight. A person broke down the silver-biscuit in the ratio of 3: 2: 1, and faces a loss of Rs 4620. Find the initial price of silver-biscuit.

    2. A.
    7520
    B.
    7530
    C.
    7450
    D.
    7560

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    Answer : Option D

    Explanation :

    Given ratio = 3: 2: 1
    Or, 3x: 2x: x
    The initial price= (6x)2 = 36x2
    After broke down the price = (3x)2: (2x)2: x2 = 9x2: 4x2: x2 = 14x2
    After breakdown, a loss of Rs. 4620 occurs.
    i.e., loss = initial price - final price
    Loss = 36x2 - 14x2 = 22x2
    22x2 = 4620
    Or, x2 =4620/22 = 210
    The initial price of silver-biscuit = 36*210 = 7560

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