Q. 134.0( 2 Votes )

# A cylinder with radius *r* and height *h* is closed on the top and bottom. Which of the following expressions represents the total surface area of this cylinder?

A. 2π*r*(*r*+*h*)

B. π*r*(*r*+2*h*)

C. π*r*(2*r*+*h*)

D. 2π*r*^{2}+*h*

Answer :

Given,

Radius of cylinder = r

Height of cylinder = h

Total surface area = area of curved surface + area of circular bases

= 2πrh + 2πr^{2}

= 2πr(h+r)

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