Question

To the nearest square meter, what is the curved surface area of the half pipe if it’s 7 m long?

The radius is 2.5 m

Answer 1

55m^2

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Answer 2

55 m²

Explanation:

The arc length of a half-circle is πr, so the area of the curved surface is ...

A = πrl = π(2.5 m)(7 m) = 17.5π m² ≈ 55 m²