In what time will a train 240 metres long cross an electric pole, if its speed be 126 km/hr?  Choose the most appropriate option.
A) 6.75 sec	B) 6.85 sec	C) 6.55 sec	D) 6.44 sec	E) 7.85 sec
Solution   Speed	= (126 x 5 /18) m/sec   = 35 m / sec   Time taken	= (240 /35) sec   = 6.85 sec.   Answer 6.85 sec
<result>B</result>
In what time will a train 240 metres long cross an electric pole, if its speed be 126 km/hr?