The perimeter of the bottom surface of a cylindrical cement column is 1.884, and the height is 3.5. How many cubic meters of concrete are needed to cast five cement columns?

Yu Xingyuan,
Bottom radius: 1.884 △ 3.14 △ 2 = 0.3 (m)
Volume of each: 3.14 × 0.3 × 0.3 × 3.5 = 0.9891 (M3)
Concrete: 0.9891 × 5 = 4.9455 (M3)

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