What is the required descent rate to reach 18000 feet from 24000 feet in time?

To determine the required descent rate from 24,000 feet to 18,000 feet, we need to calculate the altitude difference and then relate it to time if a specific descent duration is given.

The difference in altitude is:

• Starting altitude: 24,000 feet

• Final altitude: 18,000 feet

• Altitude difference: 24,000 feet - 18,000 feet = 6,000 feet.

Now, if you want to reach the final altitude quickly, the descent rate should correspond to the time you have to make that descent.

If the context assumes you have a specific time in which to complete this descent (for instance, let’s say it was 3 minutes), we calculate the descent rate as follows:

1. Convert the time into minutes. In this example, assume it's 3 minutes.

2. The descent rate can be calculated using the formula:

Descent Rate = Altitude Change / Time, or

Descent Rate = 6,000 feet / 3 minutes = 2,000 ft/min.

In this case, the required descent rate is 2,000 ft/min if you are aiming to complete the descent over the assumed time frame of 3 minutes