Question

из двух городов навстречу друг друг одновременно выехали велосипедист и легковой автомобиль . велосипедист ехал со скоростью 13,8 км/ч, а автомобиль - в 6,3 раза быстрее. найдите расстояние между городами , если велосипедист и автомобиль встретились через 4,5 ч после начала движения"

Answer 1

1) 13,8*6,3= 86,9 км/час скорость автомобиля
2) 13,8+86,9= 100,7 км/час скорость автомобиля и велосипедиста
3) 100,7 *4,5= 453,15 км расстояние между городами

Answer 2

Calculating the Distance Between Two Cities

To calculate the distance between the two cities, we can use the information provided about the speeds of the cyclist and the car, as well as the time it took for them to meet.

Given: - Speed of the cyclist, v_c = 13.8 km/h - Speed of the car, v_car = 6.3 * v_c - Time taken for them to meet, t = 4.5 hours

Calculating the Distance

To find the distance between the two cities, we can use the formula: \[ \text{Distance} = \text{Speed} \times \text{Time} \]

First, let's calculate the speed of the car: \[ \text{Speed of the car} = 6.3 \times 13.8 \]

Now, we can use the speeds and the time to find the distances traveled by the cyclist and the car, and then sum these distances to find the total distance between the cities.

Solution

The speed of the car is: \[ \text{Speed of the car} = 6.3 \times 13.8 = 86.94 \, \text{km/h} \]

The distance traveled by the cyclist is: \[ \text{Distance}_\text{cyclist} = 13.8 \times 4.5 \]

The distance traveled by the car is: \[ \text{Distance}_\text{car} = 86.94 \times 4.5 \]

Finally, the total distance between the cities is: \[ \text{Total Distance} = \text{Distance}_\text{cyclist} + \text{Distance}_\text{car} \]

Let's calculate these values.