A train covers a distance of 12 km in 10 minutes. If it takes 9 seconds to pass a telegraph post, then the length of the train is
Select the correct option.
A) 100m  B) 120m  C) 140m  D) 160m  E) 180cm
Explanation:   Speed =12/10x 60 km/hr = 72 x5/18m/sec = 20 m/sec.   Length of the train = (Speed x Time) = (20 x 9) m = 180 m   Answer: Option 180cm
<result>E</result>
A train covers a distance of 12 km in 10 minutes. If it takes 9 seconds to pass a telegraph post, then the length of the train is