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The base diameter of a cylinder is 42 cm and height is 10 cm. Find its total surface area.

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The base diameter of a cylinder is 42 cm and height is 10 cm. Find its total surface area.

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Diameter of the base of the cylinder = 42 cm 

∴ r = radius of the base of the cylinder = 21 cm 

 h = height of the cylinder = 10 cm

∴ Total surface area of the cylinder = 2πr(h+r)

= 2 × 22/7​ × 21 × (10 + 21) cm2

= 2 × 22 × 3 × 31 cm2

= 4092 cm2  

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