Question

Пароход спустился вниз по течению реки от пункта А к пункту В за 2 ч а назад вернулся за 3 ч Сколько времени между этими же пунктами будет плыть бревно?

Answer 1

Примем скорость течения реки за х

тогда из равенства расстояний туда и обратно будем иметь

(Vпарохода+х)*2=(Vпарохода-х)*3

и получим что скорость течения реки будет Vпарохода/5

а расстояние между пунктами из того же уравнения 12*Vпарохода/5

и тогда время движения бревна со скоростью течения реки составит 12 часов

Answer 2

Calculating Time for the Log to Travel Between Points A and B

To calculate the time it takes for the log to travel between points A and B, we can use the formula: time = distance / speed.

The time it takes for the log to travel from point A to point B is given as 2 hours, and the time it takes to return from point B to point A is given as 3 hours. We can use this information to calculate the speed of the log and then use it to find the time it takes for the log to travel between the same points.

The formula for speed is: speed = distance / time.

Using the given information, we can calculate the speed of the log for each direction and then use it to find the time it takes for the log to travel between the same points.

First, let's calculate the speed of the log for each direction.

The speed of the log from point A to point B is: speed AB = distance AB / time AB.

The speed of the log from point B to point A is: speed BA = distance BA / time BA.

Now, let's calculate the speed of the log for each direction using the given information.

The speed of the log from point A to point B is: speed AB = distance AB / time AB = ?.

The speed of the log from point B to point A is: **speed BA