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# If a certain machine produces bolts at a constant rate, how many secon

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Math Expert
Joined: 02 Sep 2009
Posts: 43849
If a certain machine produces bolts at a constant rate, how many secon [#permalink]

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08 Feb 2018, 22:32
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If a certain machine produces bolts at a constant rate, how many seconds will it take the machine to produce 300 bolts?

(1) It takes the machine 56 seconds to produce 40 bolts.

(2) It takes the machine 1.4 seconds to produce 1 bolt.
[Reveal] Spoiler: OA

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Joined: 26 Feb 2016
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Location: India
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If a certain machine produces bolts at a constant rate, how many secon [#permalink]

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08 Feb 2018, 23:18
The takeaway from the question stem is that the machine produces bolts at a constant rate

(1) It takes the machine 56 seconds to produce 40 bolts.
This translates to saying that the machine take $$\frac{56}{40} = 1.4$$ seconds to product one bolt.
With the time taken to product one bolt, we can tell the total time taken for the machine
to produce 300 bolts (Sufficient)

(2) It takes the machine 1.4 seconds to produce 1 bolt.
With the time taken to product one bolt, we can tell the total time taken for the machine
to produce 300 bolts (Sufficient - Option D)
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Manager
Joined: 23 Sep 2016
Posts: 76
Re: If a certain machine produces bolts at a constant rate, how many secon [#permalink]

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09 Feb 2018, 23:03
Bunuel wrote:
If a certain machine produces bolts at a constant rate, how many seconds will it take the machine to produce 300 bolts?

(1) It takes the machine 56 seconds to produce 40 bolts.

(2) It takes the machine 1.4 seconds to produce 1 bolt.

straight away D as from statement 1. we can know that certain rate and then divide 300 by that rate.
and in statement 2 we got rate 10/14 and divide 300 by 10/14. so both statement is sufficient. OA please
BSchool Forum Moderator
Joined: 07 Jan 2016
Posts: 479
Location: India
GMAT 1: 710 Q49 V36
Re: If a certain machine produces bolts at a constant rate, how many secon [#permalink]

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09 Feb 2018, 23:15
Bunuel wrote:
If a certain machine produces bolts at a constant rate, how many seconds will it take the machine to produce 300 bolts?

(1) It takes the machine 56 seconds to produce 40 bolts.

(2) It takes the machine 1.4 seconds to produce 1 bolt.

Statement 1

56 seconds - 40
x - 300

x can be calculated

sufficient

Statement 2

1.4 seconds - 1 bolt
x - 300

Sufficient

Must be D

Level 500-600 may be
Re: If a certain machine produces bolts at a constant rate, how many secon   [#permalink] 09 Feb 2018, 23:15
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