Machince A and B are each used to manufacture 660 sprockets. It takes A 10 hours longer to produce 660

Machince A and B are each used to manufacture 660 sprockets. It takes A 10 hours longer to produce 660 sprockets than machine B. B produces 10 percent more sprockets per hour than A. How many sprockets per hours does machine A produce?
A. 6
B. 6.6
C. 60
D. 100
E 110











let B = amount of time B takes to produce 660 sprockets in hours
Rate of Machine A:
660 / (10 +B)
Rate of Machine B:
660 / B
B produces 10% more sprockets per hour than A:
(660 / B) / (660 / (10 +B)) = 1.1
B = 100
therefore,
660/(10+100) = 6
ANSWER: A. 6