A train traveling at an average speed of 100km/h covers a certain distance in 3 hours 36 minutes. At what average speed must the train travel to cover the same distance in 2hours 30 minutes
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Answer:
125 km/h
Step-by-step explanation:
Speed s = Distance d/Time taken t ie s = d/t. s = 100 km/h, t = 3 h 20 min = 3 1/3 h = (10/3)h.
100 = d/(3 1/3) = d /(10/3) => d = (1 000/3) km.
2 h 40 min = 2 2/3 h = 8/3 h
s = d/t = (1 000/3)/(8/3) = 125 km/h.
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