A train covers a distance of 12 km in 10 minutes. If it takes 7 seconds to pass a telegraph post, then the length of the train is
Select:
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 7) m = 140 m   Answer: Option 140m
<result>C</result>
A train covers a distance of 12 km in 10 minutes. If it takes 7 seconds to pass a telegraph post, then the length of the train is