Question

Велосипедист ехал 4 часа со скоростью 12,3 км/ч и 2 часа со скоростью 11,7 км/ч найдите среднюю скорость велосипедиста на всем пути

Answer 1

(12,3*4+11,7*2) / 6 = (49,2+23,4) / 6 = 72,6 / 6 = 12,1 км/ч средняя скорость велосипедиста

Answer 2

Calculating the Average Speed of the Cyclist

To calculate the average speed of the cyclist, we need to find the total distance traveled and the total time taken.

The cyclist traveled for 4 hours at a speed of 12.3 km/h and for 2 hours at a speed of 11.7 km/h.

To find the total distance, we can use the formula: distance = speed × time.

For the first part of the journey: - Speed = 12.3 km/h - Time = 4 hours - Distance = 12.3 km/h × 4 hours = 49.2 km

For the second part of the journey: - Speed = 11.7 km/h - Time = 2 hours - Distance = 11.7 km/h × 2 hours = 23.4 km

The total distance traveled is the sum of the distances from both parts of the journey: - Total distance = 49.2 km + 23.4 km = 72.6 km

The total time taken is the sum of the times from both parts of the journey: - Total time = 4 hours + 2 hours = 6 hours

Now, we can calculate the average speed using the formula: average speed = total distance ÷ total time.

- Average speed = 72.6 km ÷ 6 hours = 12.1 km/h

Therefore, the average speed of the cyclist for the entire journey is 12.1 km/h.