A train covers a distance of 12 km in 10 minutes. If it takes 8 seconds to pass a telegraph post, then the length of the train is	Choose the correct choice from the following answers:
A) 100m B) 120m C) 140m D) 160m E) 170cm
Explanation:   Speed =12/10x 60 km/hr = 72 x5/18m/sec = 20 m/sec.   Length of the train = (Speed x Time) = (20 x 8) m = 160 m   Answer: Option 160m
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A train covers a distance of 12 km in 10 minutes. If it takes 8 seconds to pass a telegraph post, then the length of the train is