Mathematics, 31.07.2019 22:10 sbhishop19

Adistance of 150 km was covered by a motorcyclist traveling at an average speed of 75 km/h, by a bus at 60 km/h, a truck at 50 km/h, and a bicyclist at 20 km/h. how much time did each require to travel the entire distance? explain why speed and the time needed to travel 150 km are inversely proportional quantities?
i need to know the answer to the last sentence.
you!

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