Question

Как найти время через сколько минут догонит один автомобиль со скоростью 120кмю/ч., второго, едущего со скоростью 90 км., если автомобиль догоняющей машины выехал на 20 мин. позже

Answer 1

Чтобы найти время, раздели расстояние на скорость

Answer 2

Calculating Time to Overtake Another Car

To find the time it takes for one car to catch up to another, we can use the formula:

Time = Distance / Relative Speed

Where: - Distance is the initial distance between the two cars - Relative Speed is the difference in their speeds

Let's calculate the time it takes for the second car to catch up to the first car.

Calculating the Time Difference

The second car is traveling at 90 km/h, and the first car is traveling at 120 km/h. The relative speed at which the second car is catching up to the first car is 120 km/h - 90 km/h = 30 km/h.

The first car has a head start of 20 minutes, which we need to convert to hours. 20 minutes is equal to 20/60 = 1/3 hours.

Calculating the Time to Overtake

Now, we can use the formula to calculate the time it takes for the second car to catch up to the first car:

Time = Distance / Relative Speed

Since the distance covered by the first car during the 20-minute head start is its speed multiplied by the time, the distance covered is 120 km/h * (1/3) h = 40 km.

So, the time it takes for the second car to catch up to the first car is:

Time = 40 km / 30 km/h = 4/3 hours

Therefore, the second car will catch up to the first car in 4/3 hours, which is approximately 1 hour and 20 minutes.

I hope this helps! If you have any further questions, feel free to ask.