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 10 pages a minute more than printer A ?  Choose the correct choice from the following answers
A) 600	B) 800	C) 1000	D) 1200	E) 1500
Answer: 1200.
<result>D</result>
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 10 pages a minute more than printer A ?