Предмет: Математика, автор: Леночка2003

Лисица гонится за косулей . Скорость лисицы 11м/с , а скорость косули 9м/с. Сейчас между ними 300 м. На каком расстоянии от косули будет лисица через 40 с? Через сколько времени она догонит косулю?

Ответы

Автор ответа: uchilka2012
10
1.На каком расстоянии от косули будет лисица через 40 с

11*40=440 м пробежит  лисица за 40 с
9*40=360 м пробежит косуля за 40 с
300 + 360 = 660 м пробежит косуля всего
660 - 440 = 220 м  расстояние между ними через 40 с

2.Через сколько времени она догонит косулю?

11 - 9 = 2м/с скорость сближения
300/2=150 с= 2 мин 30 сек через столько лисица догонит косулю

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