Предмет: Математика, автор: 431600

 

из  двух городо С и Д  растояние между которыми 210 км  выехали одновременно на встречу дрг другу два автомобиля . В момент из встречи отношение пройденных ими растояний состовляло 1,2 : 1,6 .Какое расстояние проехал до встречи автомобиль из города Д

 

 

 

 

 из 22 спичек длиной 4см сложили прямоугольник  наибольшей площади . Чему равна эта площадь? 

Ответы

Автор ответа: tsoyjke2
0

1,2x+1,6x=210

2,8x=210

x=210/2,8

x=75

 

75*1,2=90км

75*1,6=120км

 

Автор ответа: Аноним
0

растояние между городами было разделено на 

1,2+1,6=2,8 частей

найдем размер одной части 

210:2,8=75 км

найдем пройденные автомобилями расстояния

1,2*75=90 км - проехал автомобиль из города С

1,6*75=120 км - проехал автомобиль из города Д

для проверки 120+90=210 км

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