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 t

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1. 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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