Question

pls give the ans with full solution

Answer 1

Vb= V bird = 5 m/sec

Vt= V train = 10 m/sec

Relative velocity of bird with respect to train

= Vb-(-Vt)

=5-(-10)

= 15 m/sec

Time taken by bird to cross train = Length of train / Relative velocity

=120/15

=8 sec

Option(2) is right


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