(A) 29 km/hr
(B) 38 km/hr
(C) 45 km/hr
(D) 48 km/hr
Correct Option is: D
Length of the train = 330 m
Speed = distance / time.
Speed of the train relative to man = 330 / 18 m/s
= 110 / 6 m/s
Convert m/s into km/hr
Therefore 110 / 6 m/s = (110 / 6 * 18 / 5) km/hr
= 22 * 3 km/hr
= 66 km/hr
Let the speed of the train be ‘x’ km/hr
Relative speed = (x +18) = 66 km/hr
X + 18 = 66
X = 48
Therefore the speed of the train is 48 km/hr