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cleaning a surface

 
 
Reply Thu 18 Aug, 2005 07:45 am
If Tryagain needs 3 hours to scrub the terras, and Mark needs 6 hours to scrub the same terras, and Whim needs 8 hours to scrub the same terras,
and Rap needs 10 hours to scrub the same terras, and Harry needs 15 hours to scrub the same terras.

How long do they need if they scrub the terras together?
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Type: Discussion • Score: 1 • Views: 542 • Replies: 5
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Tryagain
 
  1  
Reply Thu 18 Aug, 2005 08:55 am
Good, a proper job at last, what is the pay? Who the heck is Harry? Why is Rap so slow, he is not an engineer is he? Mr. Green

Now back to the % Very Happy
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markr
 
  1  
Reply Thu 18 Aug, 2005 09:07 am
24/19 hours
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Tryagain
 
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Reply Thu 18 Aug, 2005 09:33 am
Oh no! Mark has beaten me to it, and to make matters worse I have 1.68 hours. Embarrassed
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whimsical
 
  1  
Reply Fri 19 Aug, 2005 01:22 am
I guess, that Harry character has confused you.

:-)
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raprap
 
  1  
Reply Fri 19 Aug, 2005 04:10 am
1/3+1/6+1/8+1/10+1/15=1/T
40/120+20/120+15/120+12/120+8/120=1/T
95/120=1/T
T=120/95=24/19 hrs

Try, RAP is an engineer. I'm in charge, I get to hold the clipboard.

Rap
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