SSC CHSL 8 Jan 2017 Shift 1 Paper

Question : 66 of 100

Marks: +1, -0

4 hrs after a goods train passed a station, another train travelling at a speed of 72 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?

48 km/hr
57.6 km/hr
72 km/hr
38.4 km/hr

Validate

Solution:

Let the speed of goods train =

x

km/hr
Speed of another train =

72

km/hr
Distance between the two trains =

72×4=288

km
The trains are moving in same direction, ⇒ Relative speed =

(72-x)

km/hr
Time = 4 + 8 = 12 hours
⇒ speed = distance/time
⇒

72 − x =288/12=24

⇒

x= 72-24=48

km/hr

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