Question

Пловец проплыл по течению реки 1680 м. со скоростью 68 м/мин. Сколько времени ему для этого понадобилось, если скорость течения реки 44 м/ мин?

Answer 1

1680:(68+44)=15 мин.

Answer 2

Calculation of Time Taken to Swim with River Current

To calculate the time taken by the swimmer to swim with the river current, we can use the formula:

Time = Distance / Speed

Given: - Distance swam = 1680 m - Speed of the swimmer = 68 m/min - Speed of the river current = 44 m/min

To calculate the time taken, we need to consider the combined speed of the swimmer and the river current. Since the swimmer is swimming with the current, their effective speed will be the sum of their own speed and the speed of the river current.

Let's calculate the effective speed of the swimmer:

Effective Speed = Speed of the swimmer + Speed of the river current

Effective Speed = 68 m/min + 44 m/min = 112 m/min

Now, we can calculate the time taken using the formula mentioned above:

Time = Distance / Effective Speed

Time = 1680 m / 112 m/min

Calculating the above expression, we find:

Time = 15 minutes

Therefore, it took the swimmer approximately 15 minutes to swim a distance of 1680 meters with a speed of 68 m/min, considering a river current of 44 m/min.