Working together, printer a and printer b would finish the task in 24 minutes. printer a alone would finish the task in 60 minutes. how many pages does the task contain if printer b prints 5 pages a minute more than printer a ?
1: 600
2: 800
3: 1000
4: 1200
5: 1500

The correct answer to this question is option (1).

Explanation:

Let x1 = Is number of pages that printer A can print  in page/minute.  

thus x1 + 5 = Is number of page that printer B can print in page/minute.  

As printer A finishes his work in 60 min. So the task has 60x1 pages. As printers A and B both finish that task in 24 minutes. So the equation can be given as:  

60x1 = 24x1 + 24(x1 + 5)  

60x1 = 24x1 + 24x1 + 120  

60x1=48x1 + 120

60x1-48x1=120

12x1=120  

x1=120/12

x1=10

put the value of x1 in to (60x1). Therefore, the task has 60(10) = 600 pages. the task contains 600 pages.  

So the answer to this question is option (1).

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this seems to be in the wrong category. but i'll take some free points my dude

posting this in wrong category will result in people seeing it who won't know the answer.