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A machine at the golf ball factory can produce 16 golf balls in 5...

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A machine at the golf ball factory can produce 16 golf balls in 5...  [#permalink]

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New post Updated on: 24 Apr 2017, 00:41
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A machine at the golf ball factory can produce 16 golf balls in 5 minutes. If several of these machines work independently and each machine performs at the same rate, how many machines are needed to produce 32 golf balls per minute?

A) 3
B) 6
C) 8
D) 10
E) 13

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Originally posted by VyshakhR1995 on 24 Apr 2017, 00:31.
Last edited by Bunuel on 24 Apr 2017, 00:41, edited 1 time in total.
Edited the question.
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Re: A machine at the golf ball factory can produce 16 golf balls in 5...  [#permalink]

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New post 24 Apr 2017, 00:45
VyshakhR1995 wrote:
A machine at the golf ball factory can produce 16 golf balls in 5 minutes. If several of these machines work independently and each machine performs at the same rate, how many machines are needed to produce 32 golf balls per minute?

A) 3
B) 6
C) 8
D) 10
E) 13


32 golf balls per minute = 32*5 = 160 golf balls in 5 minutes.

We know that the machine can produce 16 golf balls in 5 minutes. So, we'll need 10 machines.

Answer: D.
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Re: A machine at the golf ball factory can produce 16 golf balls in 5...  [#permalink]

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New post 13 Aug 2018, 07:35
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VyshakhR1995 wrote:
A machine at the golf ball factory can produce 16 golf balls in 5 minutes. If several of these machines work independently and each machine performs at the same rate, how many machines are needed to produce 32 golf balls per minute?

A) 3
B) 6
C) 8
D) 10
E) 13


Let's answer the question in steps...

GIVEN: 1 machine produces 16 golf balls in 5 minutes.
So, 1 machine produces 16/5 golf balls in 1 minute [if we have 1/5 the time, then the output is 1/5 as much]
So, 5 machines produce 16 golf balls in 1 minute [if we have 5 times the number of machines, then the output is 5 times as much]
So, 10 machines produce 32 golf balls in 1 minute [if we double the number of machines, then the output is doubled]

Answer: D

Cheers,
Brent
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Re: A machine at the golf ball factory can produce 16 golf balls in 5...  [#permalink]

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New post 18 Aug 2018, 19:43
VyshakhR1995 wrote:
A machine at the golf ball factory can produce 16 golf balls in 5 minutes. If several of these machines work independently and each machine performs at the same rate, how many machines are needed to produce 32 golf balls per minute?

A) 3
B) 6
C) 8
D) 10
E) 13


The rate of a machine is 16/5 = 3.2 golf balls per minute. We see that to produce 32 golf balls per minutes, we need 10 machines, since 10 x 3.2 = 32.

Answer: D
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Re: A machine at the golf ball factory can produce 16 golf balls in 5... &nbs [#permalink] 18 Aug 2018, 19:43
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