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Trains Boats and Streams Practice Test 3 with solutions
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© examsnet.com
Question : 31
Total: 40
A train from Delhi to Mumbai has an average speed of 350 km/hour without stoppages, whereas the other train from Delhi to Mumbai has an average speed of 280 km/hour with stoppages. What is the average stoppage time per hour if both the trains move at the same speed?
8 minutes
12 minutes
10 minutes
14 minutes
7 minutes.
Validate
Solution:
Let the distance = d km
Time taken without stoppages =
d
350
hour
Time taken with stoppages =
d
280
hour
Stoppage time =
d
280
−
d
350
=
5
d
−
4
d
1400
=
d
1400
Average stoppage time per hour =
d
1400
×
280
d
=
1
5
×
60
= 12 m inutes
© examsnet.com
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