If the radius and height of a cylinder is x cm and y cm respectively,

1.	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
Answer» Correct option is (B) 2π xy cm² r = x cm & h = y cm \(\therefore\) Curved surface area of cylinder \(=2\pi rh\) = \(2\pi\,xy\,cm^2\) Correct option is B) 2π xy cm²

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

Answer»

Correct option is (B) 2π xy cm²

r = x cm & h = y cm

\(\therefore\) Curved surface area of cylinder \(=2\pi rh\)

= \(2\pi\,xy\,cm^2\)

Correct option is B) 2π xy cm²