Question

Теплоход должен пройти 370км за 9 часов.первые 2часа он шёл со соростью 35 км/ч,следующие 4 часа - со скоростью 45 км/ч.С какой скоростью он должен идти оставшийся путь,чтобы пройти весь путь в назначенный срок? Таблицу) И действия!

Answer 1

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Answer 2

Problem Analysis

To find the speed at which the ship should travel for the remaining distance in order to complete the entire journey in the designated time, we need to calculate the total distance covered in the first 6 hours and then subtract it from the total distance of 370 km. The remaining distance will be covered in the remaining 3 hours.

Calculation

Let's calculate the total distance covered in the first 6 hours: - For the first 2 hours, the ship traveled at a speed of 35 km/h, covering a distance of 2 hours * 35 km/h = 70 km. - For the next 4 hours, the ship traveled at a speed of 45 km/h, covering a distance of 4 hours * 45 km/h = 180 km.

Therefore, the total distance covered in the first 6 hours is 70 km + 180 km = 250 km.

Now, let's calculate the remaining distance: - The total distance of the journey is 370 km. - The distance covered in the first 6 hours is 250 km. - Therefore, the remaining distance is 370 km - 250 km = 120 km.

To find the speed at which the ship should travel for the remaining distance, we can use the formula: speed = distance / time. - The remaining distance is 120 km. - The remaining time is 3 hours.

Therefore, the speed at which the ship should travel for the remaining distance is 120 km / 3 hours = 40 km/h.

Summary

To summarize, the ship should travel at a speed of 40 km/h for the remaining 120 km in order to complete the entire journey of 370 km in the designated time of 9 hours.

Calculation Steps

1. Calculate the distance covered in the first 2 hours: 2 hours * 35 km/h = 70 km. 2. Calculate the distance covered in the next 4 hours: 4 hours * 45 km/h = 180 km. 3. Calculate the total distance covered in the first 6 hours: 70 km + 180 km = 250 km. 4. Calculate the remaining distance: 370 km - 250 km = 120 km. 5. Calculate the speed for the remaining distance: 120 km / 3 hours = 40 km/h.

Calculation Table

| Time (hours) | Speed (km/h) | Distance (km) | |--------------|--------------|---------------| | 2 | 35 | 70 | | 4 | 45 | 180 | | 6 | - | 250 | | Remaining | 40 | 120 |

Please let me know if you need any further assistance!