Question

how much sheet isrequired to make an open cylinder of radius is 4.2 mand height is 15m


slove in copy but answer have to be 451.44m.sq​

Answer 1

• Given radius = 4.2 m
• And Height= 15m

Given pipe is open so we have to find the CSA of the cylinder so as to get the area of sheet required to make it ✓

So now let us find the CSA

$= > CSA = 2\pi \: rh \\ \\ = > CSA = 2 \times \frac{22}{7} \times 4.2 \times 15 \\ \\ = >CSA = \frac{44}{7} \times 63 \\ \\ = > CSA = \frac{2772}{7} \\ \\ = >CSA = 396m ^{2}$

So by the above calculation we find the curved surface area of the cylinder is 396m²

That means the area of the sheet would required to make the Open cylinder of the given dimensions is 396 m²✓