SOLUTION: 1. a electrician requires 65 min to install a ceiling fan. The electrican and an apprentice working together take 40 min to install the fan. How long would it take the apprentice

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Question 368955: 1. a electrician requires 65 min to install a ceiling fan. The electrican and an apprentice working together take 40 min to install the fan. How long would it take the apprentice working alone to install the ceiling fan?
2. 3 - x2 + x . 2x2 + x - 3
________ ___________ ____________
x-2 2x3+3x2 x2 + 3x +2

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
an electrician requires 65 min to install a ceiling fan. The electrican and an apprentice working together take 40 min to install the fan. How long would it take the apprentice working alone to install the ceiling fan?
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Electrician rate: 1/65 job/min
Together rate:::: 1/40 job/min
Aprentice rate::: 1/x job/min
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Equation:
rate + rate = together rate
1/65 + 1/x = 1/40
Multiply thru by 40*65x to get:
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40x + 40*65 = 65x
25x = 40*65
25x = 2600
x = 2600/25
x = 104 minutes (time the apprentice would need)
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Cheers,
Stan H.