Question

Question #a28ee

Answer 1

`10s`

Explanation:

Speed of train`=10ms^-1`, due north
Speed of bird`=5ms^-1`, due south
Relative speed of bird with respect to train`=5-(-10)`
`=15ms^-1`
Length of train`=150m`
We know that `"Time" ="Distance traveled"/"Speed"`
In the given problem

`"Time" =150/15=10s`
For relative speed.