Question

Теплоход дошел от одной пристани до другой за 6 ч со скоростью 30 км/ч,а на обратный путь он потратил 9ч. На сколько теплоход уменьшил свою скорость ?

Answer 1

Это полная задача или нет?

Answer 2

28+2)*6=(28-2)*Х 
(28*2)*6=(28+2)Х 
два решения ищи

Answer 3

Problem Analysis

We are given that a boat traveled from one dock to another at a speed of 30 km/h and it took 6 hours. On the return journey, it took 9 hours. We need to determine how much the boat reduced its speed.

Solution

To find the boat's original speed, we can use the formula: distance = speed × time.

Let's assume the distance between the two docks is d km.

On the first journey, the boat traveled at a speed of 30 km/h for 6 hours, so the distance covered is 30 × 6 = 180 km.

On the return journey, the boat took 9 hours to cover the same distance, so the speed can be calculated as 180 km / 9 hours = 20 km/h.

Therefore, the boat reduced its speed by 10 km/h on the return journey.

Answer

The boat reduced its speed by 10 km/h on the return journey.

Verification

Let's verify the answer using the given information.

On the first journey, the boat traveled at a speed of 30 km/h for 6 hours, covering a distance of 30 × 6 = 180 km.

On the return journey, the boat traveled at a speed of 20 km/h for 9 hours, covering the same distance of 20 × 9 = 180 km.

The calculations confirm that the boat reduced its speed by 10 km/h on the return journey, as we found earlier.

Conclusion

The boat reduced its speed by 10 km/h on the return journey.