Answer:
hello your question is incomplete attached below is the complete question
answer : -2400 π
Step-by-step explanation:
dr/dt = -12 km/s
h = 2.5 km
r = 40 km at some instant
hence the rate of change of Volume of cylinder at that instance
= dv / dt = [tex]d(\pi r^h ) / dt[/tex]
= [tex]\pi h\frac{d(r^2)}{dt}[/tex] = [tex]-\pi h *2r *dr/dt[/tex]
hence ; dv / dt = -2400 π
