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Grazes
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A worker can build a fence in 8 hours, With the help of an assistant, the fence can be built in 5 hours. How long should it take the assistant, working alone, to build the fence?
 2 years ago
 2 years ago
Grazes Group Title
A worker can build a fence in 8 hours, With the help of an assistant, the fence can be built in 5 hours. How long should it take the assistant, working alone, to build the fence?
 2 years ago
 2 years ago

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Lily_980 Group TitleBest ResponseYou've already chosen the best response.0
Wouldn't it be the same amount of hours?
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
What was wrong with my previous answer?
 2 years ago

Grazes Group TitleBest ResponseYou've already chosen the best response.0
Not necessarily. And could you please show some work?
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
well lets say the assistant worked at the same rate as the worker. then it would take half the time, 4 hours right.
 2 years ago

Grazes Group TitleBest ResponseYou've already chosen the best response.0
Oh. Nevermind. The answer is 40/3 hours.
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
13 hours? how?
 2 years ago

Grazes Group TitleBest ResponseYou've already chosen the best response.0
Worker=W Assistant=A 1/A+1/W=1/5 1/A+1/8=1/5 8+A/8A=1/5 5*(8+A)=8A 40+5A=8A 3A=40 A=40/3 hours
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
are you sure?
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
why 1/A ?
 2 years ago

Grazes Group TitleBest ResponseYou've already chosen the best response.0
It's the work rate.
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
why is the rate 1/A ?
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
sorry, i dont get it
 2 years ago

Grazes Group TitleBest ResponseYou've already chosen the best response.0
So it takes you 6 minutes to shower, right?
 2 years ago

Grazes Group TitleBest ResponseYou've already chosen the best response.0
You've showered for 2 minutes already. Doesn't that mean that you showered for 2/6 of the regular shower time or 1/3?
 2 years ago

Grazes Group TitleBest ResponseYou've already chosen the best response.0
http://www.purplemath.com/modules/workprob.htm
 2 years ago

JamesWolf Group TitleBest ResponseYou've already chosen the best response.0
That makes sense.
 2 years ago
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