Question

    The cost of fencing a rectangular field at the rate of Rs.

    13/metre is Rs. 1560. The ratio of the length to the breadth is 7:5. Find the area of the field.
    A 800 sq m Correct Answer Incorrect Answer
    B 875 sq m Correct Answer Incorrect Answer
    C 900 sq m Correct Answer Incorrect Answer
    D 950 sq m Correct Answer Incorrect Answer
    E 1000 sq m Correct Answer Incorrect Answer

    Solution

    Let the length and breadth be 7x metres and 5x metres respectively.
    According to the question,
    2 × (7x + 5x) = 1560 / 13
    Or, 2 × 12x = 120
    Or, 24x = 120
    Or, x = 5 metres
    Therefore, area = 7x × 5x = 35x² = 35 × 25 = 875 m²

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