seabhi wrote:
Machine A produces 100 parts twice as fast as Machine B does. Machine B produces 100 parts in 40 minutes. If each machine produces parts at a constant rate, how many parts does Machine A produce in 6 minutes?
(A) 30
(B) 25
(C) 20
(D) 15
(E) 7.5
Let Machine A produces 100 parts in x hours. So, Machine B produces 100 parts in 2x hours.
Now Machine B produces 100 parts in 40 hours. So, Machine produces 100 parts in 40/2 = 20 hours.
Machine a produce in 6 minutes = 100/20 *6 = 30
Answer A
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