# MATHS

A CYLINDRICAL PIPE MADE OF METAL IS 3 CM THICK .IF THE INTERNAL RADIUS OF THE PIPE IS 10 CM, FIND THE VOLUME OF THE METAL USED IN MAKING 3M OF THE PIPE
RADIUS OF INTERNAL PIPE =10CM RADIUS OF EXTERNAL PIPE =13CMVOLUME OF PIPE=PI R^2H

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1. find the volume of the outside radius, then subtract the inside volume.
Volume metal=Length*PI(13^2-10^2)
length = 300cm

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bobpursley
2. volume
3.14*0.03*120
11.304m cube

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3. 113040m cube

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4. 20700

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5. how did they get 20700

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6. 20700

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