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profileMalik Kv
asked 2020-02-02 18:47:54 
Speed of a $300$ metre long train is $80$ km/hr.How much time does the train take to pass a bike of speed $62$ km/hr in the same direction?
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profileJay Patel
answered 2020-02-02 18:55:08 

Required time $=\dfrac{0.3}{80+62}\text{ hr}=\dfrac{0.3×3600}{80+62}\text{ seconds}$

Relative speed $=80-62=18\text{ km/hr}=5\text{m/s}$

Required time $=\dfrac{300}{5}=60\text{ seconds}$

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