A hollow cylindrical pipe is 21 dm long. Its outer and inner diameters are 10 cm and 6 cm respectively. Find the volume of copper used in making the pipe.

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Solution

Height,h=21 dm=210 cm
Outer radius,r1=5 cm
Inner radius,r2=3 cm
Therefore,
Volume=pi(r1^2-r2^2)h
=22/7(25-9)210
=10560 centimeter cube.

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A hollow cylindrical pipe is made up of copper and is 210 cm long. The outer and inner radii of the pipe are 10 cm and 6 cm respectively. Find the volume of copper used in making the pipe.

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A hollow cylindrical pipe is 21 dm long. Its outer and inner diameters are 10 cm and 6 cm respectively. Find the volume of copper used in making the pipe.

Height,h=21 dm=210 cm Outer radius,r1=5 cm Inner radius,r2=3 cm Therefore, Volume=pi(r1^2-r2^2)h =22/7*(25-9)*210 =10560 centimeter cube.

Height,h=21 dm=210 cm
Outer radius,r1=5 cm
Inner radius,r2=3 cm
Therefore,
Volume=pi(r1^2-r2^2)h
=22/7(25-9)210
=10560 centimeter cube.