# Math Help - Width = 150mm, Diameter = 47mm, Length = ? Should have tried harder in math class

1. ## Width = 150mm, Diameter = 47mm, Length = ? Should have tried harder in math class

Hi.

I wish to design a pattern to go on a rolling pin (cylinder).

The pins length is 150mm. It's diameter 47mm. What size canvass should I be working on Width = 150mm, Length = ?

Any help would be much appreciated.

Best,
Lee

2. ## Re: Width = 150mm, Diameter = 47mm, Length = ? Should have tried harder in math class

The circumference of a cylindrical rolling pin is $\pi D$. So that's $3.14 \times 47$mm = 147.7 mm.

3. ## Re: Width = 150mm, Diameter = 47mm, Length = ? Should have tried harder in math class

Perfect. Thanks ebaines.