Question

Лыжник шел на лыжах 15 мин .,проходя в минуту 200 метров. затем он уменьшил скорость на 15 м\мин. и через 20 мин после этого дошел до базы.какое расстояние прошел лыжник??

Answer 1

1)200 *15 =  3000 (м)  расстояние, которое прошёл лыжник за 15 минут.
2) 200 -  15 = 185 (м/мин)  скорость, с которой шёл лыжник 20 минут
3)185*20= 3700 (м) расстояние , которое прошел лыжник за 20 минут.
4) 3000+3700= 6700 м = 6 км 700 м  - расстояние , которое пошел лыжник до базы.
Ответ:  6 км 700 м.

Answer 2

200 м/мин*15 мин=3000 м (S=Vt) (прошел за 15 мин)
200 м/мин-15 м/мин=185 м/мин (сниженная скорость)
185 м/мин*20 мин=3700 м (прошел за 20 мин)
3000 м+3700 м=6700 м (прошел всего)
Ответ: лыжник прошел 6700 м

1 км=1000 м; 6700 м=6 км 700 м

Answer 3

Calculation of the Distance Traveled by the Skier

To calculate the distance traveled by the skier, we need to break down the information provided:

- The skier initially skied for 15 minutes at a speed of 200 meters per minute. - After that, the skier reduced their speed by 15 meters per minute. - The skier continued skiing for an additional 20 minutes.

To calculate the distance traveled during the first 15 minutes, we multiply the speed (200 meters per minute) by the time (15 minutes):

Distance during the first 15 minutes = 200 meters/minute * 15 minutes = 3000 meters.

Next, we need to calculate the distance traveled during the next 20 minutes, during which the skier reduced their speed by 15 meters per minute. To do this, we need to calculate the average speed during this period.

The average speed can be calculated by subtracting the reduction in speed (15 meters per minute) from the initial speed (200 meters per minute) and dividing it by 2. This is because the speed reduction occurred halfway through the 20-minute period.

Average speed during the next 20 minutes = (200 meters/minute - 15 meters/minute) / 2 = 92.5 meters/minute.

Now, we can calculate the distance traveled during the next 20 minutes using the average speed:

Distance during the next 20 minutes = Average speed * Time = 92.5 meters/minute * 20 minutes = 1850 meters.

Finally, we can calculate the total distance traveled by summing the distances during the first 15 minutes and the next 20 minutes:

Total distance traveled = Distance during the first 15 minutes + Distance during the next 20 minutes = 3000 meters + 1850 meters = 4850 meters.

Therefore, the skier traveled a distance of 4850 meters.

Please note that the calculations provided are based on the information given and may not account for other factors that could affect the skier's actual distance traveled.