SOLUTION: Rate of work problems: I have no experience with them and I was given the below problem without any explanation from my professor. Problem: Monica takes one hour to wash a car a

Question 467979: Rate of work problems: I have no experience with them and I was given the below problem without any explanation from my professor.
Problem:
Monica takes one hour to wash a car and bill takes two hours. How long will it take them to wash one car together?
Thank you.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

Let x represent long it will take them to wash one car together

Question states*** Per hour the Equalizer

 1/1 + 1/2 = 1/x    |Multiplying thru by 2x so as all denominators = 1

  2x + 1x =  2

     3x = 2

      x = 2/3 hr OR 40min



CHECKING our Answer***

   

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