Mathematics, 06.12.2020 01:00, idontknowwhyiam

The distance between two cities is 180 km. The distance was covered by a car in a rate of 50 km/h, by a bus at 45km/h, by a truck by 40km/h, and by a bicycle at 25km/h. How much did each take to travel the whole distance? Are speed and time directly or inversely proportional? What is the constant of variation?

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