10-02-2017
Mathematics

contestada

A railway tunnel 147m long is to be bored with a circular cross section of radius 5m.what volume of soil has to be excavated?

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HomertheGenius HomertheGenius

16-02-2017

We have to find the volume of the cylinder, where: r = 5 m and h = 147 m.
V = r² h π
V = 5² · 147 · 3.14 = 25 · 147 · 3.14 = 11,539.5 m³
Answer:
11,539.5 m³ of soil has to be excavated.

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