A carriage travels in the fog passed along a man who was walking @ 3kmph in the same direction. He could see the carriage for 4 minutes and it was visible to him upto a distance of 100 metres. What was the speed of carriage?
60 min = 3,000 m 4 min = 3000/60 × 4 = 200 m Carriage = 4 min = 200+100 = 300 m 60 min = 300/4 × 60 = 4500 m Speed = 4500m/hr = 4.5 kmph
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