Question

5. A man walks at the speed of 4 km/h. A train coming from behind him at 22 km/h passes by
him in 30 s. Find the length of the train.​

Answer 1

Step-by-step explanation:

Speed = 22km/hr - 4km/hr = 20km/hr = 20 × 1000/3600 = 5.56s

Time = 30s

Distance = Speed × Time = 5.56 × 30 = 166.8m

Hence the length of the train is 166.8m.

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Answer 2

Hey friend,

Here is the answer you are searching for,

Relative velocity= 22+4 = 28km/h = 28×5/18

= 70/9 m/s

Time = 30 sec

=> Distance = 70×30/9 = 2100/9 = 700/3 km

Therefore,

Length of train = 700/3 km

HOPE IT HELPS YOU.

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