Question

За 25 минут самолёт, двигаясь с одинаковой скоростью, пролетел 275 км. Какое расстояние он пролетит за 45 минут, если его скорость уменьшится на 2 км/мин?

Answer 1

1)275:25=11км/м скорость
2)11-2=9км/м новая скорость(после уменьшения)
3)9*45=405км
Ответ:405 км.

Answer 2

Problem Analysis

We are given that a plane traveled 275 km in 25 minutes at a constant speed. We need to find the distance it will travel in 45 minutes if its speed decreases by 2 km/min.

Solution

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

Let's calculate the initial speed of the plane: - The plane traveled 275 km in 25 minutes. - Therefore, its initial speed is 275 km / 25 min.

Now, let's calculate the distance the plane will travel in 45 minutes with the decreased speed: - The speed of the plane decreased by 2 km/min. - Therefore, the new speed is initial speed - 2 km/min. - The time is 45 minutes. - Using the formula, the distance is (initial speed - 2 km/min) × 45 min.

Let's calculate the values:

Calculation

Initial speed = 275 km / 25 min = 11 km/min

Distance with decreased speed = (11 km/min - 2 km/min) × 45 min

Answer

The plane will travel (11 km/min - 2 km/min) × 45 min.

Now, let's calculate the answer:

Calculation

Distance with decreased speed = (11 km/min - 2 km/min) × 45 min = 9 km/min × 45 min

Answer

The plane will travel 9 km/min × 45 min.

To find the final answer, we need to calculate the product of 9 km/min and 45 min.

Calculation

Distance with decreased speed = 9 km/min × 45 min = 405 km

Answer

The plane will travel 405 km in 45 minutes with the decreased speed.

Please note that the calculations provided above are based on the information given in the problem statement.