"скорость катера по течению реки 18.3 км\ч а против течения 12.4".какой путь по этой реке

"скорость катера по течению реки 18.3 км\ч а против течения 12.4".какой путь по этой реке преодалеет плот за 4 часа ?
- Предмет:
  Математика
- Автор:
  bradleyirxv
- 6 лет назад

Ответы 1

Пусть v - скорость катера, х - скорость течения реки.Составим систему уравнений:v + x =18,3v - x = 12,4Решаем систему:x = 18,3 - vv - (18,3 - v) = 12,42v = 30,7v = 15,35 (км/ч - скорость катера)x = 18,3 - 15,35x = 2,95 (км/ч - скорость течения)За 4 часа плот (плывущий по течению) преодолеет расстояние:2,95 * 4 = 11,8 (км)
- Автор:
  brandoo9yf
- 6 лет назад
- 0
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"скорость катера по течению реки 18.3 км\ч а против течения 12.4".какой путь по этой реке преодалеет плот за 4 часа ?

Ответы 1

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