On a four meter long cylindrical steel column, a 31.4-decimeter-long iron wire is used to circle the steel column for 10 times. What is the volume of the steel column? The best time is 15 minutes

On a four meter long cylindrical steel column, a 31.4-decimeter-long iron wire is used to circle the steel column for 10 times. What is the volume of the steel column? The best time is 15 minutes

The radius of cylindrical steel column is
31.4÷10÷3.14÷2
=0.5 (decimeter)
0.5x0.5x3.14x(4x10)
=31.4 (cubic decimeter)