Machine Q and machine B are each used to manufacture 660 sprockets. It takes machine Q 10 hours longer to produce 660 sprockets than machine B. Machine B produces 10 percent more sprockets per hour than machine Q. How many sprockets per hour does machine Q produces?
Choose the correct choice:
A) 6
B) 6.6
C) 60
D) 100
E) 110
[Reveal]Spoiler:   TimeB: 660/x   TimeQ: [660/x+10]   660/x = [660/x+10] *110/100   660/x =66*11/x+10   660x+10= 66*11*x   660x +6600 = 66*11*x   x= 100   plug in back to timeQ   660/100+10 =&gt; 660/110= 
<gadget id="calculator">660/110</gadget>
<output>6</output>
6=6
<result>A</result>
Machine Q and machine B are each used to manufacture 660 sprockets. It takes machine Q 10 hours longer to produce 660 sprockets than machine B. Machine B produces 10 percent more sprockets per hour than machine Q. How many sprockets per hour does machine Q produces?