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Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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20 Mar 2015, 07:16
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Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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20 Mar 2015, 10:58
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Bunuel wrote: Machine A can make 350 widgets in 1 hour, and machine B can make 250 widgets in 1 hour. If both machines work together, how much time will it take them to make a total of 1000 widgets?
A. 1 hour and 20 minutes B. 1 hour and 24 minutes C. 1 hour and 30 minutes D. 1 hour and 36 minutes E. 1 hour and 40 minutes
Kudos for a correct solution. If both machines are working together then they are producing 600 widgets per hour. Therefore\(\frac{600}{1}=\frac{1000}{x}\) x=5/3= 1 hour and 40 min Answer is E



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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20 Mar 2015, 11:57
ans is e
rate of both =600
to make 1000=1000/600



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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20 Mar 2015, 21:12
Bunuel wrote: Machine A can make 350 widgets in 1 hour, and machine B can make 250 widgets in 1 hour. If both machines work together, how much time will it take them to make a total of 1000 widgets?
A. 1 hour and 20 minutes B. 1 hour and 24 minutes C. 1 hour and 30 minutes D. 1 hour and 36 minutes E. 1 hour and 40 minutes
Kudos for a correct solution. (350+250)t=1000 600t=1000 t=5/3 t=1 hour and 40 minutes Answer: E



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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23 Mar 2015, 00:09
Rate of Machine A = \(\frac{350}{60}\) widgets per minute Rate of Machine B = \(\frac{250}{60}\) widgets per minute Combined rate = 10 widgets per minute Time required for 1000 widgets \(= \frac{1000}{10} = 100\) minutes Answer = E
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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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23 Mar 2015, 05:48



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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01 Apr 2015, 07:32
350w per hour + 250w per hour = 600w per hour 600w per hour = 100w per 10 minutes 1000w  600w = 400w
100w = 10m 400w = 40m
1h + 40m = 1 hour, 40 minutes.



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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11 Jul 2015, 01:11
Bunuel wrote: Machine A can make 350 widgets in 1 hour, and machine B can make 250 widgets in 1 hour. If both machines work together, how much time will it take them to make a total of 1000 widgets?
A. 1 hour and 20 minutes B. 1 hour and 24 minutes C. 1 hour and 30 minutes D. 1 hour and 36 minutes E. 1 hour and 40 minutes
Kudos for a correct solution. A=350/60 per minute =70/12 B=250/60 per minute =50/12 A & B rate of both machine 70/12+50/12 =120/12 =10 So, A & B both per minute rate 10 units so, 1000/10 =100 minutes So, 1 hours 40 minutes



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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13 Mar 2017, 18:36
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Total work needed to be done = 1,000 widgets A can produce = 350 widgets in 1 hr B can produce = 250 widgets in 1 hr
Together, how long to produce 1,000 widgets ? Shortcut calculation 1000/(250+350) = 10/6 Hrs



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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13 Mar 2017, 21:16
Machine A = 350/60 widgets per minute
Rate of Machine B = 250/60 widgets per minute
Combined rate = 10 widgets per minute
Time required for 1000 widgets =1000/10=100=100010=100 minutes
Answer = E ___________



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Re: Machine A can make 350 widgets in 1 hour, and machine B can make 250 w [#permalink]
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13 May 2018, 06:17
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