Descend 9,800 feet at 1,400 FPM. How long will the descent take?

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Multiple Choice

Descend 9,800 feet at 1,400 FPM. How long will the descent take?

Explanation:
Time to descend is found by dividing the altitude change by the descent rate. You need to lose 9,800 feet at 1,400 feet per minute. 9,800 ÷ 1,400 = 7, so the descent takes seven minutes. This also checks because 7 minutes × 1,400 feet per minute equals 9,800 feet. This assumes a constant descent rate throughout. If the rate changes, the time would change accordingly.

Time to descend is found by dividing the altitude change by the descent rate. You need to lose 9,800 feet at 1,400 feet per minute. 9,800 ÷ 1,400 = 7, so the descent takes seven minutes. This also checks because 7 minutes × 1,400 feet per minute equals 9,800 feet. This assumes a constant descent rate throughout. If the rate changes, the time would change accordingly.

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