Question

в 9 ч утра из поселка выехал автобус со скоростью 56 км/ч, а через час из того же поселка, но в противоположном направлении, выехал автомобиль со скоростью 72 км/ч. на каком расстоянии друг от друга окажутся автомобиль и автобус в полдень?

Answer 1

56(12-9)+72(12-9-1)=168+144=312(км)

Answer 2

полдень-12 часов

12-9=3 часа был в пути автобус

56*3=168км проехал автобус за 3 часа

12-(9+1)=2 часа был в пути автомобиль

72*2=144км проехал автомобиль за 2 часа

168+144=312км расстояние между ними в полдень

Answer 3

Problem Analysis

We are given that a bus leaves a village at 9 am with a speed of 56 km/h, and after an hour, a car leaves the same village in the opposite direction with a speed of 72 km/h. We need to determine the distance between the car and the bus at noon.

Solution

To find the distance between the car and the bus at noon, we need to calculate the distance each of them has traveled in the three hours from 9 am to noon.

Let's calculate the distance traveled by the bus first. The bus travels at a speed of 56 km/h for three hours, so the distance traveled by the bus is:

Distance traveled by the bus = Speed of the bus × Time taken by the bus

Distance traveled by the bus = 56 km/h × 3 hours

Now, let's calculate the distance traveled by the car. The car travels at a speed of 72 km/h for three hours, so the distance traveled by the car is:

Distance traveled by the car = Speed of the car × Time taken by the car

Distance traveled by the car = 72 km/h × 3 hours

Finally, to find the distance between the car and the bus at noon, we subtract the distance traveled by the bus from the distance traveled by the car:

Distance between the car and the bus at noon = Distance traveled by the car - Distance traveled by the bus

Let's calculate the distances:

Distance traveled by the bus = 56 km/h × 3 hours = 168 km

Distance traveled by the car = 72 km/h × 3 hours = 216 km

Distance between the car and the bus at noon = 216 km - 168 km = 48 km

Therefore, the car and the bus will be 48 km apart at noon.

Answer

The car and the bus will be 48 km apart from each other at noon.