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Trains Boats and Streams Practice Test 3 with solutions
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© examsnet.com
Question : 13
Total: 40
A 180 meter long train crosses another 270 meter long train running in the opposite direction in 10.8 seconds. If the speed of the first train is 60 kmph, what is the speed of the second train in kmph?
80
90
150
Cannot be determined
None of these
Validate
Solution:
Length of the trains A and B be 180 meters and 270 meters
Time = 10.8 second
Speed of the Train A = 60 kmph
=
60
×
5
18
=
50
3
m/s
Let the speed of the Train B =
5
x
18
m/s
so,
10.8 =
(
180
+
270
50
3
+
5
x
18
)
10.8 =
450
300
+
15
x
18
450 =
10.8
(
300
+
5
x
18
)
450 = 0.6 (300 + 5x)
450 = 180 + 3x
450 - 180 = 3x
3x = 270
x = 90 kmph
© examsnet.com
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