Question

Из города в одну сторону выехали мотоциклист и вслед за ним через некоторое время автомобиль. Скорость автомобиля 90 км/ч, скорость мотоцикли­ста 30 км/ч. С какой скоростью сближаются мото­циклист и автомобиль? С какой скоростью они будут удаляться друг от друга после встречи?

Answer 1

30+90=120 км/ч - их общая скорость, с какой они сближаются друг с другом, и с такой-же скоростью они будут удаляться друг от друга

Answer 2

Problem Analysis

We are given the speeds of a motorcycle and a car, and we need to determine the speed at which they are approaching each other and the speed at which they will move away from each other after they meet.

Approach

To find the speed at which the motorcycle and the car are approaching each other, we can add their speeds. To find the speed at which they will move away from each other after they meet, we can subtract the speed of the motorcycle from the speed of the car.

Solution

Given: - Speed of the car = 90 km/h - Speed of the motorcycle = 30 km/h

To find the speed at which the motorcycle and the car are approaching each other, we add their speeds: Approaching speed = Speed of the car + Speed of the motorcycle

Approaching speed = 90 km/h + 30 km/h = 120 km/h.

To find the speed at which they will move away from each other after they meet, we subtract the speed of the motorcycle from the speed of the car: Separating speed = Speed of the car - Speed of the motorcycle

Separating speed = 90 km/h - 30 km/h = 60 km/h.

Therefore, the motorcycle and the car are approaching each other at a speed of 120 km/h and will move away from each other at a speed of 60 km/h after they meet.

Let me know if I can help you with anything else.