Предмет: Физика, автор: Искандар11

наездник проходит первую половину дистанции со скоростью 30 км/ч а вторую со скоростью 20км/ч какова средняя скорость наездника на дистанции?

Ответы

Автор ответа: sedinalana
0
1/60xч время на 1 половину пути
1/40ч-время на 2 половину пути
1/60+1/40=(2+3)/120=5/120=1/24ч-общее время
1:1/24=24км/ч средняя скорость
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