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RRB Assistant Loco Pilot and Technician Model Paper 2 with solutions
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© examsnet.com
Question : 6
Total: 75
If the speed of a passenger train is enhanced with 10 km per hour, then it takes 3 hours less time to cover a distance of 360 km. Find the average speed of the train.
25 km/hour
30 km/hour
40 km/hour
60 km/hour
Validate
Solution:
Let the average speed of the train = x km/hr
According to the question,
360
x
−
360
x
+
10
=
3
⇒
360
(
x
+
10
−
x
)
x
(
x
+
10
)
=
3
⇒
x
2
+
10
x
−
1200
=
0
⇒ (x + 40)(x – 30) = 0
⇒ x = – 40 or x = 30
∴ Required speed = 30 km/hr
© examsnet.com
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