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rebecca can type a manuscript in 6 hours. if jessa helps her they can type the whole manuscript in 4 hours. How long would it take jessa if she did all the typing alone?

Guest Jul 9, 2017

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 #1
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Let Jessa's total hours working alone=J, then you have:

 

1/6 + 1/J = 1/4 multiply both sides by 12

2 + 12/J = 3      subtract 2 from both sides

12/J = 1             cross multiply

J = 12 hours - what Jessa will take working alone.

Guest Jul 9, 2017
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1+0 Answers

 #1
avatar
0
Best Answer

Let Jessa's total hours working alone=J, then you have:

 

1/6 + 1/J = 1/4 multiply both sides by 12

2 + 12/J = 3      subtract 2 from both sides

12/J = 1             cross multiply

J = 12 hours - what Jessa will take working alone.

Guest Jul 9, 2017

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