Question

How much metal sheet is required to prepare a cylindrical pipe 10 cm long and radius 7 cm?

Answer 1

Given radius = 7 cm

Length = 10 cm

Curved Surface Area = 2πrh

$2 \times \frac{22}{7} \times 7 \times 10 \\ \\ = 440 \: {cm}^{2}$
The required metal sheet is of 440 cm² .

Answer 2

curved surface area =2πrh
=2×22/7×7×10
=44×10
=440cmsquare
therefore,440 m metal sheet is required to prepare a cylindrical pipe
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