Question

Пловец проплыл дистанцию за 9 мин.Первые 5 мин он плыл со скоростью 85м\мин,после чего его скорость уменьшилась на 6 м\мин.Найдите длину дистанции

Answer 1

Первую часть плыл 5 мин, значит вторую 9-5=4 мин. 5*85=425 м проплыл за 5 мин, 4*(85-6)=316 м проплыл за 4 мин. 316+425=741 м длина дистанции

Answer 2

Calculation of Distance

To find the length of the distance, we need to calculate the total distance covered by the swimmer during the given time period.

The swimmer swam for a total of 9 minutes. During the first 5 minutes, the swimmer swam at a speed of 85 m/min. After that, the swimmer's speed decreased by 6 m/min.

To calculate the distance covered during the first 5 minutes, we can use the formula:

Distance = Speed × Time

For the first 5 minutes: Distance1 = 85 m/min × 5 min = 425 meters

For the remaining 4 minutes, the swimmer's speed decreased by 6 m/min. So, the speed for the remaining time is 85 m/min - 6 m/min = 79 m/min.

To calculate the distance covered during the remaining 4 minutes: Distance2 = 79 m/min × 4 min = 316 meters

Now, we can calculate the total distance covered by adding the distances from the first 5 minutes and the remaining 4 minutes:

Total Distance = Distance1 + Distance2 = 425 meters + 316 meters = 741 meters

Therefore, the length of the distance is 741 meters.