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Volume and Surface Area of Solid Figures

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  1. If the lateral surface area of a cylinder is 94.2 sq cm and its height is 5 cm, then find the radius of its base. (π = 3.14) ?
    1. 5 cm
    2. 8 cm
    3. 3 cm
    4. 4 cm
Correct Option: C

Given, lateral surface area = 94.2 sq cm
⇒ 2πrh = 94.2
∴ r = 94.2/(2πh) = 94.2/(2 x 3.14 x 5) = 3 cm


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