Machine P and Machine Q are each used to manufacture 220 sprockets. It takes Machine P 10 hours longer to produce 220 sprockets than Machine Q. Machine Q produces 10% more sprockets per hour than Machine A. How many sprockets per hour does Machine A produce?  Answers.
A) 5  B) 2  C) 55  D) 95  E) 125
P makes x sprockets per hour.   Then Q makes 1.1x sprockets per hour.   220/x = 220/1.1x + 10   1.1(220) = 220 + 11x   11x = 22   x = 2   The answer is 2.
<result>B</result>
Machine P and Machine Q are each used to manufacture 220 sprockets. It takes Machine P 10 hours longer to produce 220 sprockets than Machine Q. Machine Q produces 10% more sprockets per hour than Machine A. How many sprockets per hour does Machine A produce?