Question

катер за 4 часа проплыл 108км за какое времяон пройдёт 186км если увеличит скорость на 4 км в час

Answer 1

1)108 : 4=27 (км/ч) -скорость катера

2) 27 + 4=31 (км/ч) -увеличенная скорость

3) 186 : 31 =6 (ч) - время

Ответ : за 6 ч катер пройдёт 186 км.

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Answer 2

Problem Analysis

We are given that a boat traveled a distance of 108 km in 4 hours. We need to determine how long it will take for the boat to travel a distance of 186 km if its speed is increased by 4 km/h.

Solution

To solve this problem, we can use the formula: time = distance / speed.

Let's calculate the initial speed of the boat using the given information. The boat traveled a distance of 108 km in 4 hours, so the initial speed is 108 km / 4 hours = 27 km/h.

Next, we need to calculate the new speed of the boat after it increases by 4 km/h. The new speed is 27 km/h + 4 km/h = 31 km/h.

Now, we can calculate the time it will take for the boat to travel a distance of 186 km at the new speed. Using the formula mentioned earlier, the time is 186 km / 31 km/h = 6 hours.

Therefore, the boat will take 6 hours to travel a distance of 186 km if its speed is increased by 4 km/h.

Answer

If the boat increases its speed by 4 km/h, it will take 6 hours to travel a distance of 186 km.

Verification

Let's verify the answer using the given information. We know that the boat initially traveled a distance of 108 km in 4 hours, which means its speed was 27 km/h. If we calculate the time it would take for the boat to travel 186 km at a speed of 27 km/h, we get 186 km / 27 km/h ≈ 6.89 hours. Since the boat's speed has increased by 4 km/h, it makes sense that the time it takes to travel 186 km would be slightly less than 6.89 hours. Therefore, our answer of 6 hours is reasonable.

Conclusion

If the boat increases its speed by 4 km/h, it will take 6 hours to travel a distance of 186 km.