Answer:
22,500 feet
Step-by-step explanation:
Initial Height of the airplane = 35000 feet
Rate of descend = 2500 ft/min
This means for every minute the height of the plane is decreasing by 2500 feet.
We have to find how high above the sea level is the airplane after 5 minutes.
Since, in one minute the distance of plane is decreasing by 2500 feet, in 5 minutes the decrease in its distance would be = 2500 x 5 = 12,500 feet
Thus, after 5 minutes the height of airplane would have decreased by 12,500 feet. Since, the initial height of airplane was 35,000 feet, the new height after 5 minutes would be:
Height after 5 minutes = 35000 - 125000 = 22,500 feet
After 5 minutes, airplane is 22,500 feet above the sea level
