A 150 meter long train crossed a man walking at a speed of 6 km in the oppo- site directions in 6 seconds. The speed of the train in km/hr is
A66
B84
C96
D106
Answer:
B. 84
Read Explanation:
Distance=150m
Speed = Speed of train + Speed of Man
Time = 6 second
Speed of train + Speed of man
= 150/6 = 25m/s
25m/s = 25 x 18/5 = 90km/hr
Speed of train = 90 - 6 = 84km/hr