the length of the bridge is 200m,which a 100 m long train cross in 60sec. then what is the speed of train? Choose the most appropriate option
A) 6 B) 5 C) 4 D) 10 E) 8

Rationale: speed = length / time length = ( 200 + 100 ) = 300 m time = 60 sec speed = 300 / 60 = 5 m / sec answer b
Answer: B