The length of the bridge, which a train 475 metres long and travelling at 90 km/hr can cross in 30 seconds, is:	Options.
A) 200 m	B) 225 m	C) 245 m	D) 250 m	E) 275 m

Rationale: "speed = [ 90 x 5 / 18 ] m / sec = [ 25 ] m / sec time = 30 sec let the length of bridge be x metres . then , ( 475 + x ) / 30 = 25 = > 475 + x = 750 = > x = 275 answer : e"
Answer: E