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Operating at the same constant rate, 4 identical machines can produce a total of 220 candles...

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by BTGmoderatorLU » Fri Apr 17, 2020 6:07 am

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Source: Magoosh

Operating at the same constant rate, 4 identical machines can produce a total of 220 candles per minute. At this rate, how many candles could 10 such machines produce in 5 minutes?

A. 512
B. 2,200
C. 2,750
D. 11,000
E. 44,000

The OA is C
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Re: Operating at the same constant rate, 4 identical machines can produce a total of 220 candles...

by Brent@GMATPrepNow » Fri Apr 17, 2020 6:29 am
BTGmoderatorLU wrote: ↑
Fri Apr 17, 2020 6:07 am
 Source: Magoosh

Operating at the same constant rate, 4 identical machines can produce a total of 220 candles per minute. At this rate, how many candles could 10 such machines produce in 5 minutes?

A. 512
B. 2,200
C. 2,750
D. 11,000
E. 44,000

The OA is C
One approach is to take the given information and work towards the answer in steps

GIVEN: 4 machines produce 220 candles per ONE minute
So, 4 machines produce 1100 candles per FIVE minutes (a 5 times increase in time means a 5 times increase in output)
10 machines produce 2750 candles per FIVE minutes (a 2.5 times increase in machines means a 2.5 times increase in output)

Answer: C

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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Re: Operating at the same constant rate, 4 identical machines can produce a total of 220 candles...

by Scott@TargetTestPrep » Sun Apr 19, 2020 4:06 am
BTGmoderatorLU wrote: ↑
Fri Apr 17, 2020 6:07 am
 Source: Magoosh

Operating at the same constant rate, 4 identical machines can produce a total of 220 candles per minute. At this rate, how many candles could 10 such machines produce in 5 minutes?

A. 512
B. 2,200
C. 2,750
D. 11,000
E. 44,000

The OA is C
The rate of each machine is 220/4 = 55 candles per minute. Therefore, the number of candles 10 such machines could produce in 5 minutes is:

55 x 10 x 5 = 2,750

Answer: C

Scott Woodbury-Stewart
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