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Chase can do a job in 3 hours, whereas Campbell takes 4 hours to do the same job. If they work together, how long would it take them to finish the job?

 Mar 26, 2020
 #1
avatar+111321 
+1

These  types of problems aren't too bad

 

Each hour, Chase  does  1/3  of the job and Campbell does  1/4  of the job

 

Add these fractions

 

1/3  +  1/4  =    7/12

 

Take the reciprocal  =   12 / 7 hrs  =  time for both working together to do the  job

 

 

cool cool cool

 Mar 27, 2020
edited by CPhill  Mar 27, 2020
 #2
avatar+1956 
0

Nice, Chris!!!

CalTheGreat  Mar 27, 2020

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