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# Machine A, which produces 15 golf clubs per hour, fills a pr

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GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
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Kudos [?]: 1776 [0], given: 397

Machine A, which produces 15 golf clubs per hour, fills a pr [#permalink]  15 Jul 2018, 02:41
Expert's post
00:00

Question Stats:

66% (01:26) correct 33% (00:43) wrong based on 6 sessions
Machine A, which produces 15 golf clubs per hour, fills a production lot in 6 hours. Machine B fills the same production lot in 1.5 hours. How many golf clubs does machine B produce per hour?

?? golf clubs per hour

[Reveal] Spoiler: OA
60

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Sandy
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GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 105

Kudos [?]: 1776 [0], given: 397

Re: Machine A, which produces 15 golf clubs per hour, fills a pr [#permalink]  15 Jul 2018, 02:47
Expert's post
Explanation

First, calculate the size of a production lot. Machine A works at a rate of 15 golf clubs per hour and completes a production lot in 6 hrs. Plug this information into the W = RT
formula:

Attachment:

image1.jpg [ 22.3 KiB | Viewed 519 times ]

w = 15 clubs per hour × 6 hours = 90 clubs

Therefore, a production lot consists of 90 golf clubs. Since machine B can complete the lot in 1.5 hours, use the W = RT chart a second time to calculate the rate for machine B:

Attachment:

image2.jpg [ 23.09 KiB | Viewed 518 times ]

Make the calculation easier by converting 1.5 hours to $$\frac{3}{2}$$ hours:

$$90= \frac{3}{2}r$$ or r=60.
_________________

Sandy
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Re: Machine A, which produces 15 golf clubs per hour, fills a pr   [#permalink] 15 Jul 2018, 02:47
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