Question

Скорость одного лыжника 15км/ч,а другого -200м/мин. Подчеркни скорость лыжника,который бежит быстрее. На сколько больше километров он прибегает за 1ч

Answer 1

1 - 15км/ч
2 - 12км/ч
быстрее 15 км/ч! Он пробегает на 3км больше!

Answer 2

Calculation of Speeds

To compare the speeds of the two skiers, we need to convert their speeds to the same unit of measurement. The first skier's speed is given as 15 km/h, while the second skier's speed is given as -200 m/min.

To convert the second skier's speed to km/h, we can use the following conversion factors: - 1 km = 1000 m - 1 min = 1/60 h

Converting the second skier's speed to km/h: - Speed = -200 m/min * (1 km / 1000 m) * (60 min / 1 h) - Speed = -200 * (1/1000) * (60/1) km/h - Speed = -12 km/h

Comparison of Speeds

Now that we have converted both speeds to km/h, we can compare them. The first skier has a speed of 15 km/h, while the second skier has a speed of -12 km/h.

Since speed is a scalar quantity, we can compare the magnitudes of the speeds. In this case, the first skier has a faster speed because 15 km/h is greater than -12 km/h.

Calculation of Distance Covered

To calculate how much farther the faster skier runs in 1 hour, we need to find the difference in the distances covered by the two skiers in that time.

The distance covered by a skier can be calculated using the formula: - Distance = Speed * Time

For the first skier: - Distance = 15 km/h * 1 h - Distance = 15 km

For the second skier: - Distance = -12 km/h * 1 h - Distance = -12 km

Since distance is a scalar quantity, we can compare the magnitudes of the distances. In this case, the first skier covers a distance of 15 km, while the second skier covers a distance of -12 km.

To find the difference in distances, we can subtract the distance covered by the second skier from the distance covered by the first skier: - Difference = 15 km - (-12 km) - Difference = 15 km + 12 km - Difference = 27 km

Therefore, the skier who runs faster covers 27 kilometers more in 1 hour compared to the slower skier.