help me with this question.Its urgent
a train 255 M long passes another stationery train which is 170 M long in 25 seconds how long will it take qus. 1. to cross an electric pole. 2. a platform of length 221 m.
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distance = relative speed ×time
speed of train = (255+170)/25
= 425/25
= 17 m/s
= (17 × 18)/5 km/h = 306 / 5 km/h = 61.2 km/h
1. time to cross electric pole = 255 /17 = 15 s
2. time to cross a platorm = (255+221)/17
=476 /17 = 28 m/s
Hope it will help you
speed of train = (255+170)/25
= 425/25
= 17 m/s
= (17 × 18)/5 km/h = 306 / 5 km/h = 61.2 km/h
1. time to cross electric pole = 255 /17 = 15 s
2. time to cross a platorm = (255+221)/17
=476 /17 = 28 m/s
Hope it will help you
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