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# A train travels at a constant rate. If the train takes 13 minutes to

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Math Expert
Joined: 02 Sep 2009
Posts: 64240
A train travels at a constant rate. If the train takes 13 minutes to  [#permalink]

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10 Mar 2020, 03:26
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Difficulty:

15% (low)

Question Stats:

85% (01:07) correct 15% (01:51) wrong based on 55 sessions

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A train travels at a constant rate. If the train takes 13 minutes to travel m kilometers, how long will the train take to travel n kilometers?

A. 13m/n
B. 13n/m
C. 13mn
D. n/13
E. m/13

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Re: A train travels at a constant rate. If the train takes 13 minutes to  [#permalink]

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10 Mar 2020, 03:45
Bunuel wrote:
A train travels at a constant rate. If the train takes 13 minutes to travel m kilometers, how long will the train take to travel n kilometers?

A. 13m/n
B. 13n/m
C. 13mn
D. n/13
E. m/13

Given: A train travels at a constant rate.

Asked: If the train takes 13 minutes to travel m kilometers, how long will the train take to travel n kilometers?

Train travels 1 km in = 13/m minutes
Train will travel n km in 13n/m minutes

IMO B
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Re: A train travels at a constant rate. If the train takes 13 minutes to  [#permalink]

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10 Mar 2020, 03:46
Bunuel wrote:
A train travels at a constant rate. If the train takes 13 minutes to travel m kilometers, how long will the train take to travel n kilometers?

A. 13m/n
B. 13n/m
C. 13mn
D. n/13
E. m/13

m km is travelled by train in 13 min

n km is travelled by train in 13*n/m min

Bunuel: The question must mention "how long in Minutes"
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Re: A train travels at a constant rate. If the train takes 13 minutes to  [#permalink]

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15 Mar 2020, 01:53
Speed = distance/time

- Speed = m/13 km/min

- To travel n kms, time = d/t => n/(m/13) or 13n/m

Option B!
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Re: A train travels at a constant rate. If the train takes 13 minutes to   [#permalink] 15 Mar 2020, 01:53