Question

Расстояние между городами равно 520 км.В 8 ч утра из городов одновременно выехали навстречу друг другу два автобуса и прибыли на некую автостанцию в 12 ч.С какой скоростью ехал второй автобус,если скорость движения первого-56 км/ч?СРОЧНО!

Answer 1

1)12-8=4- ехал
2)56х4=224- проехал1
3)520-224=296- проехал2
4)296:4=74 км/ч
Ответ:74 км/ч

Answer 2

Problem Analysis

We are given that the distance between two cities is 520 km. Two buses start simultaneously from these cities and arrive at a certain bus station at 12 PM. We need to find the speed of the second bus, given that the speed of the first bus is 56 km/h.

Solution

To find the speed of the second bus, we can use the formula:

Speed = Distance / Time

We know the distance between the cities is 520 km. We need to find the time it takes for the buses to meet at the bus station.

Let's calculate the time it takes for the first bus to reach the bus station. We know that the speed of the first bus is 56 km/h. The time can be calculated using the formula:

Time = Distance / Speed

Substituting the values, we get:

Time = 520 km / 56 km/h

Let's calculate the time it takes for the first bus to reach the bus station.

Calculation

Time taken by the first bus = 520 km / 56 km/h

Answer

The time taken by the first bus to reach the bus station is approximately 9.29 hours.

Now, let's calculate the time taken by the second bus to reach the bus station. We know that both buses started at the same time and arrived at the bus station at 12 PM. So, the time taken by the second bus can be calculated as:

Time taken by the second bus = 12 hours - Time taken by the first bus

Substituting the values, we get:

Time taken by the second bus = 12 hours - 9.29 hours

Now, we can calculate the speed of the second bus using the formula:

Speed = Distance / Time

Substituting the values, we get:

Speed = 520 km / (12 hours - 9.29 hours)

Let's calculate the speed of the second bus.

Calculation

Speed of the second bus = 520 km / (12 hours - 9.29 hours)

Answer

The speed of the second bus is approximately 173.33 km/h.

Please note that these calculations are approximate and may vary slightly depending on the exact values used.