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    Question

    A circular grass lawn of 35 metres in radius has a path

    7 metres wide running around it on the outside. Find the cost of gravelling the path if the cost of gravelling is Rs.75 per sq.m.
    A Rs.175200 Correct Answer Incorrect Answer
    B Rs.125570 Correct Answer Incorrect Answer
    C Rs.138450 Correct Answer Incorrect Answer
    D Rs.127050 Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    Area of the lawn = πr² = 22/7 × 35 × 35 = 3850 m ² Area of the lawn including path= πr² = 22/7 × 42 × 42 = 5544 m ² Area of the path = 5544m ² - 3850m ² = 1694m2 [if gte msEquation 12]> m 2 [if !msEquation]-->[endif]--> Cost of gravelling = 1694m2× Rs. 75 per sq.m. = Rs. 127050

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