Machine A and machine B are each used to manufacture 220 sprockets. It takes machine A 10 hours longer to produce 220 sprockets than machine B. Machine B produces 10 percent more sprockets per hour than machine A. How many sprockets per hour does machine A produces?  Choose the correct choice from the following options:
A) 2
B) 3
C) 4
D) 5
E) 6
Machine B: Takes x hours to produce 220 sprockets   Machine 2: Takes (x+10) hours to produce 220 sprockets   Machine B: In 1 hour, B makes 220/x sprockets   Machine 2: In 1 hour, 2 makes 220/(x+10) sprockets   Equating:   1.1(220/(x+10)) = 220/x   242/(x+10) = 220/x   242x = 220x+2200   22x = 2200   x = 100   2 makes  220/(110)= 
<gadget id="calculator"> 220/(110)</gadget>
<output>2</output>
2 sprockets per hour   2nswer : 2
<result>A</result>
Machine A and machine B are each used to manufacture 220 sprockets. It takes machine A 10 hours longer to produce 220 sprockets than machine B. Machine B produces 10 percent more sprockets per hour than machine A. How many sprockets per hour does machine A produces?