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29 Jan 2019, 03:34
Kudos
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
59% (01:31) correct
41%
(02:06)
wrong
based on 537
sessions
History
Date
Time
Result
Not Attempted Yet
A train travels at an average speed of 90 km/hr without any stoppages. However, its average speed decrease to 60 km/hr on account of stoppages. On an average, how many minutes per hour does the train stop?
(A) 12 minutes
(B) 18 minutes
(C) 20 minutes
(D) 24 minutes
(E) 30 minutes
(A) 12 minutes
(B) 18 minutes
(C) 20 minutes
(D) 24 minutes
(E) 30 minutes
01 Sep 2021, 22:11
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Bunuel
In 1 hour, the train travels 90 km (if there are no stoppages).
But in 1 hour, it actually travels only 60 km i.e. 2/3rd of the distance. So actually it runs for only 2/3rd the time i.e. 40 mins. So it stops for 20 min per hour on average.
General Discussion
29 Jan 2019, 03:44
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Bunuel
in 60 minutes the train is supposed to travel 90 km without stoppages
actually, in 60 minutes the train travels 60 km with stoppages i.e. 30 km less
with average speed 90 km/hr, the time taken by train to travel 30 km = 30/90 = 1/3 hours = 20 minutes
i.e. Train stops for 20 minutes every hour
Answer: Option C
