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#1 2008-01-30 03:55:17
- pete
- Guest
plumbing question
Hi,Can anyone answer this for me.
A plumber needs to cut 900mm lengths of pipe but cuts them at 945mm which is wasting 45mm how much will he waste if he uses 43metres?
Can you please tell me how to work this out.
Thank you .Pete uk.
#2 2008-01-30 09:44:23
- MathsIsFun
- Administrator
- Registered: 2005-01-21
- Posts: 7,711
Re: plumbing question
I don't think you can get a pipe 43 m long, but anyway:
43000 mm / 945 mm = 45.502...
I don't know how he used the "0.502...", but let us assume he cut 45 lengths, and got 900 mm each time: Useful length = 45 x 900 mm = 40500 mm
And waste = 43000 - 40500 = 2500 mm
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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