Предмет: Математика, автор: krissta

396,397,398 Решите пожалуйста)

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Ответы

Автор ответа: wiktoria12
0
№ 396
х - собств скорость катера
а - скорость течения
6(х+а)=42а
х+а=7а
х=6а
найдем время:
42а:6а=7 часов по озеру

№ 397
10-2,6=7,4 км/ч собственная скорость лодки
7,4-2,6=4,8 км/ч скорость лодки против течения реки
4,8*3=0,4 км расстояние



Автор ответа: krissta
0
Спасибо но) 398
Автор ответа: pavelpopov1473
0
по озеру катер проплывет это расстояние за 1.8 часа. если нужно объяснение-пиши

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