Question

Расстояние до противоположного берега лесного озера пловец преодолел за 12 мин.Он двигался со скоростью 50м/мин.На сколько метров в минуту уменьшилась скорость плавца, если на обратный путь он потратил 15мин?

Answer 1

1)50*12=600м
2)600/12=40м/мин

Answer 2

Calculation of the Distance and Speed Reduction

To calculate the distance to the opposite shore of the lake and the reduction in the swimmer's speed, we can use the given information.

The swimmer covered the distance to the opposite shore in 12 minutes at a speed of 50 m/min. We need to find out how much the swimmer's speed decreased on the return journey, which took 15 minutes.

Let's calculate the distance to the opposite shore first. Since the swimmer covered this distance in 12 minutes at a speed of 50 m/min, we can use the formula:

Distance = Speed × Time

Substituting the given values:

Distance = 50 m/min × 12 min = 600 meters.

Now, let's calculate the swimmer's speed on the return journey. The swimmer covered the same distance of 600 meters in 15 minutes. Using the same formula:

Speed = Distance / Time

Substituting the given values:

Speed = 600 meters / 15 min = 40 meters per minute.

Therefore, the swimmer's speed decreased by 10 meters per minute on the return journey.

Conclusion

The swimmer covered a distance of 600 meters to the opposite shore of the lake in 12 minutes at a speed of 50 m/min. On the return journey, the swimmer's speed decreased by 10 meters per minute, resulting in a speed of 40 meters per minute.