Two airplanes leave St. Louis at the same time and fly in opposite directions. If one travels at 500 kilometers per hour, and the other at 600 kilometers per hour, how long will it take for them to be 1925 kilometers apart?
they are moving apart at 1100 km/hr
time = distance/speed
To find out how long it will take for the airplanes to be 1925 kilometers apart, we can use the formula:
distance = speed * time
Since the airplanes are flying in opposite directions, their speeds will be added together.
First, let's calculate the combined speed of the two airplanes:
combined speed = speed of first airplane + speed of second airplane
combined speed = 500 km/h + 600 km/h
combined speed = 1100 km/h
Now, we can rearrange the formula to solve for time:
time = distance / combined speed
Plugging in the given distance of 1925 kilometers and the combined speed of 1100 kilometers per hour:
time = 1925 km / 1100 km/h
time ≈ 1.75 hours
Therefore, it will take approximately 1.75 hours for the two airplanes to be 1925 kilometers apart.