Question

От автобусной станцыии отошёл автобус со скоростью 40 км/ч. Через три чеса в том же направлении выехал другой автобус со скоростью 40/ч. Через какое время второй автобус догонит первый?

Answer 1

Второй автобус не догонит первый автобус, т.к. их скорости равны.

Answer 2

40 умножить на 3равно120 120 разделить на40 равно 4 часа

Answer 3

Problem Analysis

We are given that a bus departs from a bus station with a speed of 40 km/h. After three hours, another bus departs from the same station in the same direction with a speed of 40 km/h. We need to determine how long it will take for the second bus to catch up to the first bus.

Solution

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

Let's assume that the time it takes for the second bus to catch up to the first bus is t hours.

During the first three hours, the first bus has traveled a distance of 40 km/h * 3 h = 120 km.

During the same time, the second bus has not yet started, so its distance from the bus station is 0 km.

After the three-hour mark, both buses are moving at the same speed of 40 km/h. The second bus needs to catch up to the first bus, which is 120 km ahead.

Using the formula, we can set up the equation: t = 120 km / 40 km/h.

Simplifying the equation, we find that t = 3 hours.

Therefore, it will take the second bus 3 hours to catch up to the first bus.

Answer

The second bus will catch up to the first bus after 3 hours.

Explanation

After three hours, the first bus has already traveled a distance of 120 km. At this point, the second bus starts moving with the same speed of 40 km/h. Since both buses are moving at the same speed, it will take the second bus 3 hours to cover the same distance and catch up to the first bus.