Предмет: Математика, автор: masha30071

теплоход  шел 5 часов по течению реки и 2 часа против течения. какой путь прошел теплоход за эти 7 часов, если собственная скорость теплохода 19,4 км ч , а скорость течения реки 1,6 км ч?

Ответы

Автор ответа: Counterbee
0
19,4+1,6=21
19,4-1,6=17,8
21*5=105
17,8*2=35,6
35,6+105=140,6
Ответ:1
40,6
Автор ответа: Ilshakhov2002
0
1) 19,4-1.6 это мы узнаем с какой скоростью теплоход плыл против течения
2) 19,4+1,6 это мы узнаем с какой скоростью плыл теплоход по течению
3) то что получили в первом действии умножаем на 2 это мы узнали какой путь он прошел против течения
4) то что получи во втором действии умножаем на 5 это мы узнали какой путь он прошел по течению
5) складываем 3 и 4 действия и получаем ответ
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