A steel pipe is 8 cm in diameter, 1 cm in wall thickness and 1 m in length. How many cubic centimeters is the volume of this steel pipe?

A steel pipe is 8 cm in diameter, 1 cm in wall thickness and 1 m in length. How many cubic centimeters is the volume of this steel pipe?

Inner radius: 8 △ 2 = 4 (CM), outer radius: 4 + 1 = 5 (CM), 1m = 100 cm, bottom area of steel pipe: 3.14 × 52-3.14 × 42, = 3.14 × 9, = 28.26 (cm2); volume of steel pipe: 28.26 × 100 = 2826 (cm3); answer: volume of this steel pipe is 2826 cm3