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)

Answer 1

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.