Find the rate of change of volume of a cone if dr/dt is 3 in./min. and h=4r when r = 8 inches

since base is pi r^2

it's given that h=4r

now find derivative

× dr/dt

r=8 , dv/dt = 3

dv/dt = 4pi (8)^2 ×3 = 768pi

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.