Предмет: Математика, автор: Rose80

Расстояние между городами равно 360 км. Половину пути автомобиль ехал со скоростью 60 км/ч, а вторую половину пути-со скоростью 90 км/ч. Найдите среднюю скорость автомобиля на протяжении всего пути.
Помогите срочно. По действиям!)

Ответы

Автор ответа: Аноним

180:60=3 (час) прошел 1 половину пути
180:90=2 (час) прошел 2 половину пути
3+2=5 (час) был в дороге
360:5=72 (кмчас) средняя скорость.
Ответ: 72 кмчас.

Автор ответа: Rose80

Спасибо огромное=)

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