#### Question

Find the total surface area of a closed cylindrical drum if its diameter is 50 cm and height is 45 cm. (π = 3.14)

#### Solution

Diameter = 50 cm

Radius = 25 cm

Height = 45 cm

Total surface area = 2 π r (h + r )

= `2 xx 3.14 xx 25 (25 + 45)`

= 10990 sq cm

Thus, the total surface area of the closed cylinderical drum is 10990 sq cm.

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Solution Find the Total Surface Area of a Closed Cylindrical Drum If Its Diameter is 50 Cm and Height is 45 Cm. (π = 3.14) Concept: Surface Area of Cylinder.