Mathematics, 01.03.2021 16:40, celeste2627

Kemen leaves home at 09:00 and drives at a speed of 20 km/h. After hour he increases his speed to 45 km/h and continues at this speed until 10:45.
He stops from 10:45 until 11:30 and then returns home at a speed of 50 km.

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Kemen leaves home at 09:00 and drives at a speed of 20 km/h. After hour he increases his speed to 4...