Working together, printer A and printer B would finish the task in 30 minutes. Printer A alone would finish the task in 50 minutes. How many pages does the task contain if printer B prints 3 pages a minute more than printer A ?	Choose one: A) 200 B) 400 C) 600 D) 800 E) 900
30*A + 30*B = x pages   in 30 mins printer A will print = 30/50 * x pages = 3/5*x pages   thus in 30 mins printer printer B will print x - 3/5*x = 2/5*x pages   Also it is given that printer B prints 3 more pages per min that printer A. In 30 mins printer 400 will print 90 more pages than printer A   thus 3/5*x - 2/5*x = 90 =&gt; x = 400 pages   Answer: 400
<result>B</result>
Working together, printer A and printer B would finish the task in 30 minutes. Printer A alone would finish the task in 50 minutes. How many pages does the task contain if printer B prints 3 pages a minute more than printer A ?