Question

A carriage driving in a fog passed a man who was walking at 3km/h in the same direction. he could see the carriage for 4 minutes and it was visible to him upto 100 m. what is the speed of the carriage?

Answer 1

I think 25 kmph maybe???

Answer 2

Speed of man = 3 km/hr

Speed in m/sec = (3 x 5/18 )= 5/ 6 m/s

Distance covered by man in 4 min = (5 x 4 x 60)/6 = 200 m

Total distance travelled by the train = 100 + 200 = 300 m

Time taken by the train to travel 300 m = 4 min

Speed of the train = 300/240 = 5/4 m/sec

Speed in Km/hr = (5/4 x 18/5) = 4.5 km/h.


i hope it will help you
regards