1.

3.A train is 1 km long. Average speed of the train is 60kmph.How long will it take to pass.(a) An electric post(b) A bridge of length 1 km.

Answer»

Length of train = 1 kmSpeed of train = 60 km/hr

Distance = speed * time 1) Time to pass electric post Distance is 1 km length of train 1 = 60*time time = 1/60 hr or 1 minute

2) Time to pass bridge of length 1km Distance is 2 km 2 = 60*time time = 2/60 hr or 2 minutes



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