Question

из одного улья одновременно вылетили две пчелы в противоположных направлениях. Через 0,15 часов расстояние между ними было 6,3км . Одна пчела летела со скоростью 21,6 км\ч. Найдите скорость полёта второй пчелы.

Answer 1

1) 21.6 км/час х 0.15 = 3.24 км -  пролетела первая пчела

2) 6.3 км - 3.24 км =  3.06 км - пролетела вторая

3) 3.06 км : 0.15 = 20.4 км/час - скорость второй пчелы

 

Интересно, составители задачи сами замеряли скорость пчёл???

Answer 2

Problem Analysis

We are given that two bees flew out of a beehive in opposite directions. After 0.15 hours, the distance between them was 6.3 km. We also know that one bee was flying at a speed of 21.6 km/h. We need to find the speed of the second bee.

Solution

Let's assume that the speed of the second bee is x km/h.

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

For the first bee: - Speed = 21.6 km/h - Time = 0.15 hours - Distance = 21.6 km/h × 0.15 hours = 3.24 km

For the second bee: - Speed = x km/h - Time = 0.15 hours - Distance = x km/h × 0.15 hours = 0.15x km

According to the problem, the total distance between the two bees after 0.15 hours is 6.3 km. Therefore, we can write the equation:

3.24 km + 0.15x km = 6.3 km

To find the value of x, we can solve this equation.

Solving the Equation

Let's solve the equation:

3.24 km + 0.15x km = 6.3 km

Subtracting 3.24 km from both sides of the equation:

0.15x km = 6.3 km - 3.24 km

0.15x km = 3.06 km

Dividing both sides of the equation by 0.15 km:

x km = 3.06 km / 0.15

x km = 20.4 km

Answer

The speed of the second bee is 20.4 km/h.

Verification

Let's verify our answer using the given information.

For the first bee: - Speed = 21.6 km/h - Time = 0.15 hours - Distance = 21.6 km/h × 0.15 hours = 3.24 km

For the second bee: - Speed = 20.4 km/h - Time = 0.15 hours - Distance = 20.4 km/h × 0.15 hours = 3.06 km

The total distance between the two bees after 0.15 hours is 3.24 km + 3.06 km = 6.3 km, which matches the given information.

Therefore, our answer of the second bee's speed being 20.4 km/h is correct.

Conclusion

The speed of the second bee is 20.4 km/h.