Problema Solution
An airplane climbs at a rate of 66.8 feet per minute. It descends at twice the rate it climbs. Assuming it descends at a constant rate, how many feet will the airplane descend in 30 minutes?
Answer provided by our tutors
climbing rate: v1 = 66.8 ft/min
descending rate: v2 = 2*v1 = 2*66.8 ft/min
the the airplane descends: t = 30 min
the length of the descending: d = v2*t
d = 2*66.8*30
d = 4008 ft
in 30 min the airplane will descend 4008 feet.