An airplane flying at 15, 000 ft descends to land at an airport. During the airplane's final approach it
descends from 15,000 ft to 7, 400 ft in 3 min.

my guess is

step-by-step explanation:

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a

it will take 9 minutes