1.

A 210 meter long train is moving due North at a of 25m/s. A small bird is flying due South a little above the train with speed 5m/s. The time taken by the bird to cross the train is                 [AMU (Med.) 2001]

A.          \[6s\]                             
B.          \[7s\]
C.          \[9s\]                             
D.          \[10s\]
Answer» C.          \[9s\]                             


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