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Bunuel
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A passenger on a train counts the telegraph posts as the train moves. Updated on: 26 Apr 2026, 10:44
Originally posted by Bunuel on 10 Feb 2026, 23:09.
Last edited by Bunuel on 26 Apr 2026, 10:44, edited 1 time in total.
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90% (01:49) correct 10% (01:25) wrong based on 61 sessions

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A passenger on a train counts the telegraph posts as the train moves. If the posts are 80 meters apart and the train is traveling at a constant speed of 72 kilometers per hour, how many posts will the passenger pass every minute?

A. 12
B. 15
C. 18
D. 20
E. 24

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M47-36

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A passenger on a train counts the telegraph posts as the train moves. Updated on: 19 Feb 2026, 02:21
Originally posted by Bunuel on 19 Feb 2026, 02:15.
Last edited by Bunuel on 19 Feb 2026, 02:21, edited 1 time in total.
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Bunuel
A passenger on a train counts the telegraph posts as the train moves. If the posts are 80 meters apart and the train is traveling at a constant speed of 72 kilometers per hour, how many posts will the passenger pass every minute?

A. 12
B. 15
C. 18
D. 20
E. 24
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GMAT Club Official Solution:

Convert speed to meters per minute:

72 km/h = 72 * 1000/60 = 1200 m/min.

Posts are 80 m apart, so posts per minute = 1200/80 = 15.

Answer: B.
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A passenger on a train counts the telegraph posts as the train moves. 11 Feb 2026, 00:11
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speed of train 72 kmph or 72 x 1000/60 m per min. = 1200 m/min. Thus train crosses 1200 m in a min. Every 80 m a pole will be crossed. Thus no of pole = 1200/80 = 15.
Bunuel
A passenger on a train counts the telegraph posts as the train moves. If the posts are 80 meters apart and the train is traveling at a constant speed of 72 kilometers per hour, how many posts will the passenger pass every minute?

A. 12
B. 15
C. 18
D. 20
E. 24

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A passenger on a train counts the telegraph posts as the train moves. 11 Feb 2026, 05:25
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Bunuel
A passenger on a train counts the telegraph posts as the train moves. If the posts are 80 meters apart and the train is traveling at a constant speed of 72 kilometers per hour, how many posts will the passenger pass every minute?

A. 12
B. 15
C. 18
D. 20
E. 24

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The telegraph posts are 80 metres apart.

Train moving speed = 72 kmph = 72*(5/18) = 20 metre per second.

One second , you move 20 metre.

So, in 60 seconds, we get 1200 metres.

The number of posts at a distance of 1200 metres = 1200/80 = 15 posts.

Option B
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A passenger on a train counts the telegraph posts as the train moves. 19 Feb 2026, 05:14
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Step 1: Convert speed to meters per minute
The train travels at 72 km/hr. Let's convert this:

72 km/hr = 72 × 1,000 meters per hour = 72,000 meters/hour

Now convert to meters per minute:
72,000 ÷ 60 = 1,200 meters per minute

Step 2: Count the posts
Posts are 80 meters apart. In 1,200 meters, how many posts does the passenger pass?

1,200 ÷ 80 = 15 posts

Answer: B
---

Quick Check: Always ensure your units match. Posts are in meters, so convert speed to meters. Question asks "per minute," so convert time to minutes.
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