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25 Mar 2021, 04:30
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A
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Difficulty:
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88% (01:42) correct
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Two machines, working simultaneously at their respective constant rates, can print 400 sheets in 5 hours. If one machine can print 200 sheets in 3 hours, what is the rate of the other machine, in sheets per hour?
A. 40/3
B. 80/3
C. 100/3
D. 80
E. 200
A. 40/3
B. 80/3
C. 100/3
D. 80
E. 200
25 Mar 2021, 04:36
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Bunuel
Combined rate of A+B = 400 sheets in 5 hours
i.e.\(\frac{400}{5}=80\) sheets per hour
A's rate \(= \frac{200}{3}\) sheets per hour
B's rate = \(80-\frac{200}{3} = \frac{40}{3}\) sheets per hour
Answer: Option A
25 Mar 2021, 14:09
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M1+M2 = 400 Sheets in 5 hours = 80 sheets in 1 hour
M1 = 200 Sheets in 3 hours, Hourly rate = 200/3 = ~66.66
So in 5 hours , M1 can print = 66.667*5 = 333.333
So M2 have printed = 400-333.333 = 66.6667 , M2s hourly rate = 66.6667/5 = 13.33
Ans: A
M1 = 200 Sheets in 3 hours, Hourly rate = 200/3 = ~66.66
So in 5 hours , M1 can print = 66.667*5 = 333.333
So M2 have printed = 400-333.333 = 66.6667 , M2s hourly rate = 66.6667/5 = 13.33
Ans: A
