The number of square inches of paper required to make a hollow cylinder is equal to the curved surface area of the cylinder.

True

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False

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Solution

The correct option is A
True

Consider a rectangular paper with dimension a $\times$ b.

When it is folded along its length or width, it will form a hollow cylinder. The surface area of the cylinder formed will be equal to the area of paper required.
Curved surface area of cylinder = a $\times$ b
So, the given statement is true.

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Similar questions

Q. Which is false in case of a hollow cylinder?
(a) Curved surface area of a hollow cylinder = 2πh(R + r).
(b) Total surface area of a hollow cylinder = 2π(R + r)(h + R − r).
(c) Inner curved surface area of a hollow cylinder = 2 πh(R − r).
(d) Area of each end of a hollow cylinder = π(R² − r²).

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