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CAT Exam 2021 Slot 1 Solved Paper
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© examsnet.com
Question : 45
Total: 66
Two trains cross each other in 14 seconds when running in opposite directions along parallel tracks. The faster train is 160 m long and crosses a lamp post in 12 seconds. If the speed of the other train is 6 km/hr less than the faster one, its length, in m, is
184
192
190
180
Validate
Solution:
Speed of the fastest train
=
160
12
=
40
3
m
∕
s
Speed of the slower train
=
40
3
−
(
6
×
5
18
)
=
35
5
m
∕
s
Sum of speeds (when the train travels towards each other)
=
40
3
+
35
3
=
25
m
∕
s
let the slower train be
x
meters long: then:
160
+
x
25
=
14
on solving
x
=
190
m
© examsnet.com
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