If the radius and height of a cylinder is x cm and y cm respectively, then the curved surface area of cylinder.
If the radius and height of a cylinder is x cm and y cm respectively, then the curved surface area of cylinder.
A) 2πx (x + y) cm2
B) 2π xy cm2
C) π x2y
D) 2π x2y cm2
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Correct option is (B) 2π xy cm2
r = x cm & h = y cm
\(\therefore\) Curved surface area of cylinder \(=2\pi rh\)
= \(2\pi\,xy\,cm^2\)
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