Question

find the area of metal sheet required to prepare a pipe of length 3cm and radius6.28. (π=3.14)​

Answer 1

Let the pipe be of negligible thickness

then area of pipe = area of metal sheet

$2\pi \times rh = area \: of \: metal \: sheet$

2×3.14×6.28×3=A

$area \: required = 39.44cm {}^{2}$