Question

area of hollow cylinder will be : ​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Cylinder is Hollow

Let r is the radius of inner circle.

r1 is the radius of outer circle.

Area of hollow cylinder will be

$area \: of \: inner \: surface \: curved \: = 2\pi \: r \times height$

$area \: of \: outersurface \: curved = 2\pi \times r1 \times height$