Question

14. Першу годину автомобіліст їхав зі швидкістю 50 км/год і розрахував, що коли він і далі буде їхати з такою швидкістю, то запізниться в місто на півгодини. Він збільшив швидкість на 20% і приїхав своєчасно. Який шлях проїхав автомобіліст? Скільки часу він знаходився у дорозі? Якою є середня швидкість руху автомобіліста?

Answer 1

Ответ:

50+20=70

Объяснение:

в:70 км рух автомобіліств

Answer 2

To solve this problem, let's break it down step by step.

Given Information:

- The driver initially traveled at a speed of 50 km/h for one hour. - He calculated that if he continued at this speed, he would be half an hour late. - He increased his speed by 20% and arrived on time.

Calculating the Distance Traveled:

To find the distance traveled by the driver, we need to calculate the distance he would have covered if he had continued at a speed of 50 km/h for the entire journey and compare it to the distance he actually traveled.

Let's assume the total distance to the destination is D.

If the driver had continued at a speed of 50 km/h for the entire journey, he would have covered a distance of 50 km/h * 1 hour = 50 km.

Since he arrived half an hour late, the time he actually traveled is 1 hour - 0.5 hours = 0.5 hours.

To find the distance he actually traveled, we can use the formula: Distance = Speed * Time.

Let's denote the actual distance traveled as d.

Therefore, d = 50 km/h * 0.5 hours = 25 km.

So, the driver traveled a distance of 25 km.

Calculating the Time Spent on the Road:

The driver initially traveled for 1 hour at a speed of 50 km/h. After increasing his speed, he arrived on time.

Therefore, the total time spent on the road is 1 hour.

Calculating the Average Speed:

To find the average speed, we can use the formula: Average Speed = Total Distance / Total Time.

The total distance traveled is 25 km, and the total time spent on the road is 1 hour.

Therefore, Average Speed = 25 km / 1 hour = 25 km/h.

So, the average speed of the driver is 25 km/h.

In summary: - The driver traveled a distance of 25 km. - He spent 1 hour on the road. - His average speed was 25 km/h.

I hope this helps! Let me know if you have any further questions.