Question

Помогите решить задачу пожалуйста Из одного гнезда одновременно в противоположных направлениях вылетели две вороны Через 0,12 часа между ними было 7,8 км. Скорость одной вороны 32,8 км/ч. Найдите скорость второй вороны

Answer 1

Найдем суммарную скорость разлетания ворон
7,8:0,12=65 км/ч
найдем скорость второй вороны
65-32,8=32,2 км/ч

Answer 2

Problem Analysis

We are given that two crows flew out of a nest simultaneously in opposite directions. After 0.12 hours, the distance between them was 7.8 km. We also know that the speed of one crow is 32.8 km/h. We need to find the speed of the second crow.

Solution

Let's assume the speed of the second crow is v km/h.

We can use the formula: distance = speed × time to calculate the distance traveled by each crow.

For the first crow: - Speed = 32.8 km/h - Time = 0.12 hours - Distance = 32.8 km/h × 0.12 hours = 3.936 km

For the second crow: - Speed = v km/h - Time = 0.12 hours - Distance = v km/h × 0.12 hours = 0.12v km

According to the problem, the total distance between the two crows after 0.12 hours is 7.8 km. Therefore, we can write the equation:

3.936 km + 0.12v km = 7.8 km

Simplifying the equation:

0.12v km = 7.8 km - 3.936 km 0.12v km = 3.864 km

Now, we can solve for v by dividing both sides of the equation by 0.12:

v = 3.864 km / 0.12 v ≈ 32.2 km/h

Answer

The speed of the second crow is approximately 32.2 km/h.