Question

.На змаганнях лижник під номером 9 стартував через 4 хв після лижника під номером 1. Пробігши 10 хв, лижник № 9 відставав від лижника № 1 на 950 м. Знайдіть швидкість лижника № 9, якщо швидкість лижника № 1 дорівнює 300 м/хв

Answer 1

Відповідь:325м/хв

Покрокове пояснення:

1) 4 + 10 = 14 хв ( біг лижник 1)

2) 14*300 = 4200 м (пробіг лижник 1 від початку руху);

3) 4200 - 950 = 3250 м ( пробіг лижник 9 за 10хв)

4) 3250 : 10 = 325 м/хв ( швидкість лижника 9).

Answer 2

To find the speed of skier number 9, we can use the formula:

Speed = Distance / Time

Given that skier number 9 started 4 minutes (or 4 * 60 = 240 seconds) after skier number 1 and that skier number 9 was 950 meters behind skier number 1 after 10 minutes (or 10 * 60 = 600 seconds), we can calculate the speed of skier number 9.

Calculation:

- Time taken by skier number 9 = 10 minutes - 4 minutes = 6 minutes = 6 * 60 = 360 seconds - Distance covered by skier number 9 = Distance covered by skier number 1 + Distance between skier number 9 and skier number 1 = 0 + 950 meters = 950 meters

Now, we can calculate the speed of skier number 9:

Speed of skier number 9 = Distance / Time = 950 meters / 360 seconds

Using the given information that the speed of skier number 1 is 300 meters per minute (or 300 meters / 60 seconds = 5 meters per second), we can convert the speed of skier number 9 to meters per second.

Speed of skier number 9 = (950 meters / 360 seconds) * (1 minute / 60 seconds) = 2.6389 meters per second

Therefore, the speed of skier number 9 is approximately 2.6389 meters per second.