Question

Из улья вылетела пчела и полетела со скоростью 8 м/с.Через 30 с вслед за ней вылетела вторая пчела и полетела со скоростью 9 м/с. Через какое время вторая пчела догонит первую ?

Answer 1

30•9=270( м.)
ответ:второя пчела догонит первую за 270 м.

Answer 2

Problem Analysis

We are given that a bee flies out of the hive with a speed of 8 m/s, and after 30 seconds, another bee flies out with a speed of 9 m/s. We need to determine how long it will take for the second bee to catch up to the first bee.

Solution

To solve this problem, we can use the concept of relative speed. The relative speed between the two bees is the difference in their speeds. In this case, the relative speed is 9 m/s - 8 m/s = 1 m/s.

Since the second bee starts 30 seconds after the first bee, we can consider this as the time difference between the two bees. Therefore, the second bee needs to cover the same distance as the first bee in 30 seconds in order to catch up.

To find the time it takes for the second bee to catch up to the first bee, we can divide the distance between the two bees by the relative speed.

Let's calculate the time it takes for the second bee to catch up to the first bee:

Distance between the two bees: The distance covered by the first bee in 30 seconds can be calculated using the formula: distance = speed * time. Therefore, the distance covered by the first bee is 8 m/s * 30 s = 240 meters.

Time taken by the second bee to catch up: The time taken by the second bee to catch up to the first bee can be calculated using the formula: time = distance / relative speed. Therefore, the time taken by the second bee to catch up is 240 meters / 1 m/s = 240 seconds.

Therefore, the second bee will catch up to the first bee in 240 seconds.

Answer

The second bee will catch up to the first bee in 240 seconds.