Предмет: Математика, автор: samira2004701

Из двух посёлков,между которыми 75 км,вышли одновременно навстречу друг к другу два лыжника. Первый идёт со скорость. 12 км/ч, а второй со скоростью 13 км/ч. Они идут уже 2 часа. Какое расстояние им надо ещё пройти до встречи? Сколько времени это займёт?

Ответы

Автор ответа: MrLyanda

Скорость сближения Vc=12+13= 25 км/ч
Путь за 2 ч=25*2=50 км
Осталось пройти 75-50=25 км
Займет времени 25/25=1 ч

samira2004701: Спасибо

Автор ответа: larisaorlova65

1) 12+13=25 (км/ч) -скорость приближения лыжников друг к другу
2) 12*2=24 (км)-прошёл первый
3)13*2 =26(км) -прошёл второй
4)24+26= 50 (км) прошли вместе за 2 часа
5) 75-50=25 (км)-осталось пройти
6)25:25=1 (час) потребуется для прохождения оставшегося участка пути

samira2004701: Спасибо

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