Предмет: Физика, автор: radfemXDlesbian

СРОЧНОООООО!!!!!!!!!!!ДАМ 50 БАЛЛОВ!!!!!!!!!!!!!!!!!!!!
За 20 хвилин поїзд проїхав 30 км.Далі він рухався ще півтори години зі швидкість 108км/год Яка середня швидкість руху потяга

Ответы

Автор ответа: maxyakovenko
0

Ответ:

20.9 м/с

Объяснение:

108+30=138км = 138000м (в одинцях СИ)

90хв + 20хв = 110хв = 6600 с

138000м / 6600с = 20.9090909, округлимо до десятих = 20.9 м/с

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