A 62.8-meter-long iron wire was used to wind a cylindrical steel column for 10 circles. How many cubic meters is the volume of the 5-meter-long steel column?

The length of 10 circles is 62.8 meters, so the length of each circle is 62.8 / 10 = 6.28 meters
So the radius of each circle is 6.28/3.14/2 = 1 meter
That is, the section of the steel column is a circle with a radius of 1m
Volume of steel column = sectional area * height = 3.14 * 1 * 1 * 5 = 15.7m3

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