Machine R and machine B are each used to manufacture 660 sprockets. It takes machine R 10 hours longer to produce 660 sprockets than machine B. Machine B produces 10 percent more sprockets per hour than machine R. How many sprockets per hour does machine R produces?
Choose the correct choice from the following answers
A) 6	B) 6.6	C) 60	D) 100	E) 110
I think the correct answer is A.   Machine R produces at a speed of R sp/hour and B at a speed of B sp/hour.   so, 660/R=(660/B)+10 and B=1,1 R---&gt;1,1*660=660+11R---&gt;6=6, so answer 6 is correct
<result>A</result>
Machine R and machine B are each used to manufacture 660 sprockets. It takes machine R 10 hours longer to produce 660 sprockets than machine B. Machine B produces 10 percent more sprockets per hour than machine R. How many sprockets per hour does machine R produces?