Machine A and machine B are each used to manufacture 550 sprockets. It takes machine A 10 hours longer to produce 550 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?	Select the correct option.
A) 6
B) 5
C) 7
D) 8
E) 9
Machine 5: Takes x hours to produce 550 sprockets   Machine A: Takes (x+10) hours to produce 550 sprockets   Machine 5: In 1 hour, 5 makes 550/x sprockets   Machine A: In 1 hour, A makes 550/(x+10) sprockets   Equating:   1.1(550/(x+10)) = 550/x   605/(x+10) = 550/x   605x = 550x+5500   55x = 5500   x = 100   A makes   550/(110)= 
<gadget id="calculator">  550/(110)</gadget>
<output>5</output>
5 sprockets per hour   Answer : 5
<result>B</result>
Machine A and machine B are each used to manufacture 550 sprockets. It takes machine A 10 hours longer to produce 550 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?