SOLUTION: Frank can build a fence in twice the time it would take Sandy. Working together, they can build it in 7 hrs. How long will it take each if them to do it alone?

Question 1044056: Frank can build a fence in twice the time it would take Sandy. Working together, they can build it in 7 hrs. How long will it take each if them to do it alone?
Answer by ikleyn(52906) (Show Source): You can put this solution on YOUR website!
.
Frank can build a fence in twice the time it would take Sandy. Working together, they can build it in 7 hrs.
How long will it take each if them to do it alone?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 = ,        (1)
F = 2S.            (2)

--->

 = ,  --->   =   --->  F =  =  =  hours is the time for Frank.

Then the time for Sandy is  =  hours.

Answer.   hours is the time for Frank;   =  hours is the time for Sandy.

For details on how to solve joint work problems see the lesson
- Using Fractions to solve word problems on joint work,
in this site.

RELATED QUESTIONS
Bob can build a fence in 10 hours, if Frank helps him they can build it in 6 hours. How... (answered by richwmiller)

Sarah can build a fence in 9 hours. Joe can do the same in 6 hours. How long would it... (answered by richwmiller)

Three boys can build a fence in 6 hours, 7 hours, and 8 hours working individually. How... (answered by ankor@dixie-net.com)

Kyle can build a fence in 3 hours. Kenneth can build a fence in 4 hours. If they work... (answered by htmentor)

A carpenter can build a tool shed three times as fast as his apprentice. Working... (answered by richwmiller)

A carpenter can build 15 toolsheds three times as fast as his apprentice. Working... (answered by TimothyLamb,josgarithmetic)

It takes red 9 hours longer than Hannah to build a stone wall. Working together, they can (answered by mananth)

a mason can build a wall in 6 hours less than an apprentive. together they can build the... (answered by ptaylor)

a mason can build a wall in six hours less than an apprentice. together they can build... (answered by josgarithmetic)