Mathematics
The formula for the volume of the material contained in the given cylindrical pipe is:
π(R + r) h
π(R - r)h
π(R2 + r2)h
π(R2 - r2)h
Answer
Let R be the outer radius of the cylinder.
Let r be the inner radius of the cylinder.
And, h be the height of the cylinder.
As we know that volume of cylinder = πr2h
Volume of outer cylinder = πR2h
Volume of inner cylinder = πr2h
So, volume of the cylindrical pipe = Volume of outer cylinder - Volume of inner cylinder
= πR2h - πr2h
= π(R2 - r2)h
Hence, option 4 is the correct option.
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