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    Question

    The length of a rectangle, area of which is 252

    cm2, is equal to the radius of a circle of area 2464 cm2. Find the perimeter of the rectangle?
    A 74 cm Correct Answer Incorrect Answer
    B 52 cm Correct Answer Incorrect Answer
    C 22 cm Correct Answer Incorrect Answer
    D 50 cm Correct Answer Incorrect Answer

    Solution

    Let the radius of the circle = r┬а Area of circle = 2464 = 22/7 ├Ч r ├Ч r┬а тЗТ r = 28 cm┬а Area of rectangle = 252 = L ├Ч B = 28 ├Ч B┬а тЗТ B = 9 cm┬а Perimeter = 2 ├Ч (L + B) = 2 ├Ч (28 + 9) = 74 cm┬а┬а

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