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OpenStudy (anonymous):
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? If the soil is to be taken away in wagons of capacity 75 cubic meteres each. How many wagons are needed?
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OpenStudy (anonymous):
pi*r^2*147
hero (hero):
Nice job explaining nothing @yahya90
hero (hero):
Also, that can't possibly be correct since volume is in cubic meters.
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