a plane descending from 36000 feet at 125 feet per minute takes how long to land

Question

The word problem wants me to figure how long it would take a plane to land if it were at 36000 feet altitude, descending at 125 feet per minute.

Answer 1

36000/125= 288 minutes

 

288/60=4.8 hours

 

It will take 4.8 hours in landing

Answer 2

125 feet per minute means it will take 8 minutes to descend 1,000 feet (125 Ft/min times 8 min = 1,000 feet). So to descend 36,000 feet would take 36 times as long as it takes to descend 1,000 feet. 36 times 8 = 288 min, or 4.8 hours.