Question

Автомобиль движется с постоянной скоростью 80 км / ч. Сколько километров он преодолеет за 120 мин ? за 15 мин ? за 30 мин ? сможет ли автомобиль преодолеть 20 метров за 1 секунду ? с какой наименьшей скоростью должен двигаться данный автомобиль , чтобы выполнить указанное требование ?

Answer 1

120мин=2 часа
80*2=160 за 120 минут
15 мин=1/4 часа
80*1/4=20за 15 минут
30мин=1/2часа
80*1/2=40 за 30 минут
80 км/ч=22.2м/сек
то есть успеет

Answer 2

1) 120 мин : 60 = 2 часа
2) 80 * 2 = 160 км проедет за 2 часа = 120 мин
3) 15 мин : 60 = 0,25 часа
4) 80 * 0,25 = 20 км проедет за 15 минут
5) 30 мин : 60 = 0,5 часа
6) 80 * 0,5 = 40 км проедет за 30 мин
7) 20 м : 80 км/ч = 0,02 : 80 = 0,00025 часа = 0,9 секунд
8) 1 сек > 0,9 сек значит сможет автомобиль проехать 20 метров , даже быстрее
9) 20 м : 1 сек = 20 м/сек должна быть скорость автомобиля

Answer 3

Calculation of Distance Traveled

To calculate the distance traveled by a car moving at a constant speed, we can use the formula:

Distance = Speed × Time

Let's calculate the distance traveled for each given time:

1. For 120 minutes (2 hours): - Speed: 80 km/h - Time: 120 minutes = 2 hours - Distance = 80 km/h × 2 hours = 160 km

2. For 15 minutes: - Speed: 80 km/h - Time: 15 minutes = 0.25 hours - Distance = 80 km/h × 0.25 hours = 20 km

3. For 30 minutes: - Speed: 80 km/h - Time: 30 minutes = 0.5 hours - Distance = 80 km/h × 0.5 hours = 40 km

Therefore, the car will travel: - 160 km in 120 minutes (2 hours), - 20 km in 15 minutes, and - 40 km in 30 minutes.

Can the Car Travel 20 Meters in 1 Second?

To determine if the car can travel 20 meters in 1 second, we need to convert the units to match the given speed.

1 kilometer = 1000 meters 1 hour = 3600 seconds

The car's speed is given as 80 km/h, which can be converted to meters per second as follows:

80 km/h = (80 × 1000) meters / (1 × 3600) seconds = 22.22 meters/second

Since the car's speed is 22.22 meters/second, it can indeed travel 20 meters in 1 second.

Minimum Speed Required to Meet the Given Requirement

To determine the minimum speed required for the car to meet the specified requirement, we can rearrange the distance formula:

Speed = Distance / Time

Given that the distance is 20 meters and the time is 1 second, we can calculate the minimum speed required as follows:

Speed = 20 meters / 1 second = 20 meters/second

Therefore, the car must travel at a minimum speed of 20 meters per second to meet the specified requirement.

Please let me know if there's anything else I can help you with!