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A certain photocopying machine can make 10 copies every 4 se

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A certain photocopying machine can make 10 copies every 4 se [#permalink] New post 28 Jun 2020, 08:59
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A certain photocopying machine can make 10 copies every 4 seconds. At this rate, how many copies can the machine make in 6 minutes?

(A) 900
(B) 600
(C) 360
(D) 240
(E) 15O


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Re: A certain photocopying machine can make 10 copies every 4 se [#permalink] New post 28 Jun 2020, 10:44
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6 minutes = \(6 \times 60 = 360\) seconds

In 4 seconds it makes 10 copies.

\(4 \times 90 = 360\)

Copies = \(10 \times 90 = 900\)

OA, A
Carcass wrote:
A certain photocopying machine can make 10 copies every 4 seconds. At this rate, how many copies can the machine make in 6 minutes?

(A) 900
(B) 600
(C) 360
(D) 240
(E) 15O


Kudos for the right answer and explanation

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Re: A certain photocopying machine can make 10 copies every 4 se [#permalink] New post 28 Jun 2020, 15:04
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First we calculate how many copies the machine can make in 1 minute-> 60/4 = 15 "work periods" in 1 minute.
15*10 = 150 copies per minute.

In 6 minutes -> 150*6 = 900 copies in 6 minutes

Answer choice A.
Re: A certain photocopying machine can make 10 copies every 4 se   [#permalink] 28 Jun 2020, 15:04
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A certain photocopying machine can make 10 copies every 4 se

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