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# Maths question help Watch

1. A piece of piping is in the shape of a cylinder.

The piping is rolling on a horizontal floor.
Every time the piping completes 6 revolutions it travels a distance of 1 metre.

Work out the diameter of the piping.
2. (Original post by hbos14)
A piece of piping is in the shape of a cylinder.

The piping is rolling on a horizontal floor.
Every time the piping completes 6 revolutions it travels a distance of 1 metre.

Work out the diameter of the piping.
1 metre = 1000 millimetres

1000 millimetres is traveled in 6 revolutions, so that is your circumference:

1000/6 = 166.67 mm

Divide by pi and you get your diameter = 53.05 mm

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