The length of the bridge, which a train 130 metres long and travelling at 36 km/hr can cross in 45 seconds, is:
Choose the correct choice from the following answers:
A) 320 m	B) 225 m	C) 245 m	D) 250 m	E) 240 m

Rationale: "speed = [ 36 x 5 / 18 ] m / sec = 10 m / sec time = 45 sec let the length of bridge be x metres . then , ( 130 + x ) / 45 = 10 = > 130 + x = 450 = > x = 320 m . answer : a"
Answer: A