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प्रश्न
Find the total surface area of a cylinder if the radius of its base is 5 cm and height is 40 cm.
उत्तर
Radius of the cylinder, r = 5 cm
Height of the cylinder, h = 40 cm
∴ Total surface area of cylinder, S = \[2 π r\left( r + h \right) = 2 \times 3 . 14 \times 5 \times \left( 5 + 40 \right) = 2 \times 3 . 14 \times 5 \times 45\] = 1413 cm2
Thus, the total surface area of cylinder is 1413 cm2.
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