A train of 150 metre length is going towards north direction at a speed of 10 
. A parrot flies at the speed of 5 
towards south direction parallel to the railways track. The time taken by the parrot to cross the train is
A
12 
B
8 
C
15 
D
10 sec.
Text Solution
Verified by ExpertsThe correct answer is:
D
Choose the positive direction of 
‐ axis to be from south to north. Then
Velocity of train 
Velocity of parrot 
Relative velocity of parrot with respect to train
i.e. parrot appears to move with a speed of 15 
from north to south
Time taken by parrot to cross the train
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