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Total excavated earth: Pi*5.5m squared*7km=665500 cubic metres (Taking Pi as 22/7)
thanks for that quotation and more espcially for the help
These are nice problems ...
A cylindrical tunnel 5.5m in diameter is driven through a mountain for a distance of 7km. the ezcavated earth i s spread to a depth of 50cm on the surface of a road 11m wide. Calculate the number of ilometers of the road that can be covered with all of the excavated earth. (Take pi as 22/7)