train without stoppage travels with an average speed of 80 km h and with stoppage it travels with an...........

Quantitative Aptitude (CGL) Problems on trains

train without stoppage travels with an average speed of 80 km/h and with stoppage,it travels with an average speed of 72 km/h.

For how many minutes does the train stop on an average per hour?

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SSC CGL 11 June 2019 Shift-3

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Explanation:

Explanation:
With stoppages speed = 72 kmph
Without stoppages speed = 80 kmph
Let the total distance = L.C.M of 80 and 72= 720
So, time taken with stoppages = $_{72}^{720}=10 hr$
Time taken without stoppages = $_{80}^{720}=9 hr$
Difference = 1 hr
In 10 hour trip 1 hour is spend on stoppages.
Per hour train stops for = $_{10}^{1}\times 60 =6$