Два пішоходи долають міст зі швидкістю4, 25 км/год за 0, 012 год. Яка довжина мосту?​

4.25*2*0.012=0.102 km

а —скорость первого пешехода в км/час

b —скорость второго пешехода в км/час

t —время в пути до встречи (для обоих пешеходов оно одинаковое)))

тогда

до встречи первый часть пути =(a*t) км

до встречи второй часть пути =(b*t) км

после встречи первый оставшуюся ему часть пути за 4 часа

b * t / a = 4 отсюда: t = 4 * a / b

после встречи второй оставшуюся ему часть пути за 9 часов

a * t / b = 9

a*4*a / b² = 9

a / b = 3 / 2

t = 4*3/2 = 2*3 = 6

ответ: первый был в пути 4+6 = 10 часов

второй был в пути 9+6 = 15 часов

6 часов они шли до встречи

Пошаговое объяснение:

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Пошаговое объяснение:

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