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14 June, 05:45

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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  1. 14 June, 05:55
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    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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