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    Find the area of a sphere whose radius is 7 cm. (The value of π is 22/7)
    Question

    Find the area of a sphere whose radius is 7 cm. (The value of π is 22/7)

    A.

    225 cm²

    B.

    616 cm²

    C.

    144 cm²

    D.

    729 cm²

    Correct option is B

    Given:
    The radius (r) of the sphere is 7 cm
    Formula Used:
    The surface area of a sphere of radius r is 4πr2
    Solution:
    Area of the sphere=4π×72 4×(227)×72 4×22×7 616 cm2\text{Area of the sphere} = 4\pi \times 7^2 \\\implies 4 \times \left(\frac{22}{7}\right) \times 7^2\\\implies 4 \times 22 \times 7\\\implies 616 \, \text{cm}^2\\​​

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