Question

14. A rectangular sheet of paper is having measures 11 cm* 4 cm. it is folded
without overlapping to make a cylinder of height 4 cm. Find the volume of the cylinder.​

Answer 1

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Length of the paper = circumference of the cylinder

11=2πr

$11 = 2 \times \frac{22}{7} \times r$

$\frac{11 \times 7}{2 \times 22} = r$

$r = \frac{7}{4}$

$\sf{Volume \: of \: cyclinder = \pi {r}^{2} h}$

$\frac{22}{7} \times \frac{7}{4} \times \frac{7}{4} \times 4 = \frac{77}{2} = 38.2 {cm}^{2}$

So volume of cylinder is 38.2cm²

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