Question

за 7 ч тракторист вспахал 4,9 га. с какой скоростью двигался трактор,если ширина полосы, вспахиваемая плугами, равна 1, 75?

Answer 1

1) 4,9 : 7 = 0,7 (га) - за 1 час

2) 1 га = 10000 м2 ,     0,7 га/час = 7000 м2/час

3) 7000 : 1,75 = 4000 (м/час) = 4 (км/час)

Ответ:  4.

Answer 2

Calculation of Tractor Speed

To calculate the speed at which the tractor was moving, we need to use the given information. The tractorist plowed 4.9 hectares of land in 7 hours, and the width of the plowed strip is 1.75 meters.

First, let's convert the area from hectares to square meters: - 1 hectare = 10,000 square meters - Therefore, 4.9 hectares = 4.9 * 10,000 = 49,000 square meters.

Next, we can calculate the length of the plowed strip: - The area of the strip is equal to the length multiplied by the width. - The area of the strip is 49,000 square meters, and the width is 1.75 meters. - Therefore, the length of the strip is 49,000 / 1.75 = 28,000 meters.

Finally, we can calculate the speed of the tractor: - The tractor covered a distance of 28,000 meters in 7 hours. - Therefore, the speed of the tractor is 28,000 / 7 = 4,000 meters per hour.

Therefore, the tractor was moving at a speed of 4,000 meters per hour.