Posted by **thomas** on Wednesday, April 9, 2014 at 11:56am.

A father can do a job as fast as two sons working together. If one sone does the job alone in three hours and the other does it alone in six hours, how many hours does it take the father to do the job alone?

a. 1

b. 2

c. 3

d. 4

e. 4 1/2

please answer and explain

## Answer This Question

## Related Questions

- math - A father can do a job in a certain number of hours. His son takes twice ...
- math - Michael and Barry can complete a job in 2 hours when working together. If...
- math - 1.A father can do a job in a certain number of hours. His son takes twice...
- math - Jack and Jerry can complete a job in 2 hours when working together.If ...
- math - 1.a collection of 105 coins consists of 1 peso and 5 pesos. if the total ...
- College Algebra - It takes Todd 3 hours longer than Tom to paint a 4x5 feet ...
- Math - Working together two people can cut a lawn of grass in 5 hours. One ...
- Algebra - Tom and Jerry are working together to weed the garden. Working ...
- Math - Gina and Maggie working together can do their MI-4 project in 24 hours. ...
- Algebra - Ann, Matt and Zack are working for a cleaning company. Together, they...

More Related Questions