Предмет: Алгебра, автор: olya9275

СРОЧНО,ПОМОГИТЕ ПОЖАЛУЙСТА!!
Из одного города в другой выехал автомобиль со скоростью 70 км/ч, а через 40 мин - ещё один со скоростью 84 км/ч. Найдите расстояние ль одного города до другого, если оба автомобиля прибыли в другой город одновременно. Ответ дайте в км.
И ЕСЛИ МОЖНО,ТО ПОДРОБНО ПОЖАЛУЙСТА.

Ответы

Автор ответа: dtnth
0
1) 40мин=40/60ч=2/3ч
2) 70*2/3=140/3 км - расстояние между автомобилями в момент выезда второго автомобиля
3) 84-70=14 кмчас - разность скоростей ( на столько км за час сокращается расстояние между автомобилями)
4) 140/3:14=10/3 ч -через столько времени после выезда второго автомобиля оба автомобиля приедут в другой город
5) 84*10/3=280 км - расстояние между городами
ответ: 280 км
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