Machine problem

[corruptedmage25]

If machine A finishes a paper in 2 days and machine B finsihes a paper in 3 days, how many days will it take to finish a paper if they work together?

-how do u do these problems. im gonna get raped ont he sats tomorow if i cant figure it out!

 

[Kalvin00]

lolatyou

 

[tfinch2]

42 days

 

[Rastus]

5

 

[blue1friday2]

I don't know but I just had a test in which I got the wrong answer to a question exactly like this!

 

[corruptedmage25]

someone show me steps to this

 

[Kalvin00]

machine 1 + machine 2 * number of papers / amount of work * day of the week = your answer

 

[KarenMarie]

2 hours + 3 hours = 5 hours /2 machines.

 

[rayjayturbo]

How much will they do in 1 day? Go with a common denominator, so machine A does 1/2 the paper in one day, machine B does 1/3 the paper in one day. Machine A does 3/6 of the paper in one day, machine B does 2/6 of the paper in one day. Together they do 5/6 of the paper in 1 day or 24 hours. Add in the time it will take to do the other 1/6 of the paper. Hope this helps.