# Tunnel boring

How much material did they dig when cutting the 400m long tunnel? The content of the circular segment, which is the cross section of the tunnel is 62m2.

Result

V =  24800 m3

#### Solution:

$l=400 \ \text{m} \ \\ S=62 \ \text{m}^2 \ \\ \ \\ V=S \cdot \ l=62 \cdot \ 400=24800 \ \text{m}^3$

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