two airplanes travelling in opposite directions , leave an airport at the same time. if one plane averages 480 ml/hr and the other averages 520 ml/hr, how long will it take before they are 2000 ml apart?

let the time be t hrs

solve :
480t + 520t = 2000

btw, what is ml/hr ?
wouldn't that be a rate a nurse would use to express the rate at which an infusion would be given?

Yes

To find out how long it will take for the two airplanes to be 2000 miles apart, we need to calculate the time it takes for them to cover a total distance of 2000 miles.

Let's break down the problem.

First, let's determine the combined speed at which the two airplanes are moving apart. Since they are traveling in opposite directions, their speeds will add up.

Combined speed = Speed of the first airplane + Speed of the second airplane

Combined speed = 480 mph + 520 mph

Combined speed = 1000 mph

Now, we can determine the time it takes for them to cover a distance of 2000 miles using the formula:

Time = Distance / Speed

Time = 2000 miles / 1000 mph

Time = 2 hours

Therefore, it will take 2 hours for the two airplanes to be 2000 miles apart.