A 400 m long train takes 36 sec. To cross a man walking at 20 km/hr in the direction opposite to that train. What was the speed of the train?
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his speed 20 km per hour
= 20000 m per 60 minutes
=20000 m per 60 x60 second
,=20000 m per 3600 second
=200 m in 36 seconds
but given train length 400
actual crossing =400 -200
=200m in 36 seconds
speed of train = 200m in 36 seconds
= 20 km /hour
mkrishnan:
mark as brainliest
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