Question

Чайка пролетела 180 км за 4 ч. За это время она преодолела две трети расстояния от острова до земли. На каком расстоянии от земли находится остров? С какой скоростью летела чайка?

Answer 1

180 : 4 = 45 км/ч- скорость чайки .
180 : 2 = 90 км-одна часть расстояния .
90 * 3 = 270 км- расстояние от острова до земли .

Answer 2

Problem Analysis

We are given that a seagull flew 180 km in 4 hours and during this time, it covered two-thirds of the distance from an island to the ground. We need to determine the distance of the island from the ground and the speed at which the seagull was flying.

Solution

Let's break down the problem step by step.

1. Distance covered by the seagull: The seagull flew 180 km in 4 hours. Therefore, its average speed can be calculated as 180 km / 4 hours = 45 km/h.

2. Distance from the island to the ground: The seagull covered two-thirds of the total distance from the island to the ground in 4 hours. Let's assume the total distance from the island to the ground is represented by d km. Therefore, the distance covered by the seagull is (2/3) * d km.

3. Using the average speed formula, we can calculate the time taken by the seagull to cover the distance from the island to the ground: time = distance / speed. Substituting the values, we have 4 hours = (2/3) * d km / 45 km/h.

4. Solving the equation for d, we get d = (4 hours * 45 km/h) / (2/3) = 90 km.

Therefore, the island is located at a distance of 90 km from the ground.

To calculate the speed at which the seagull was flying, we can use the average speed formula: speed = distance / time. Substituting the values, we have speed = 180 km / 4 hours = 45 km/h.

Therefore, the seagull was flying at a speed of 45 km/h.

Answer

The island is located at a distance of 90 km from the ground, and the seagull was flying at a speed of 45 km/h.