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JEE Mains 13-Apr-2023 Shift 2 Solved Paper
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© examsnet.com
Question : 32
Total: 90
A passenger sitting in a train A moving at
90
km
∕
h
observes another train B moving in the opposite direction for
8
s
. if the velocity of the train B is
54
km
∕
h
, then length of train B is :
[13-Apr-2023 shift 2]
120
m
200
m
320
m
80
m
Validate
Solution:
V
A
=
90
km
hr
=
25
ms
−
1
V
B
=
54
km
hr
=
15
ms
−
1
→
V
BA
=
→
V
B
−
→
VA
=
40
ms
−
1
Time of crossing
=
Length of train
Re lative velocity
8
=
ℓ
40
ℓ
=
8
×
40
=
320
meter
© examsnet.com
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