Question

Percy is filling a cylindrical tank with water. The tank is

Answer 1

Answer:

B

Step-by-step explanation:

78x9=702

702/6=117 minutes.

Answer 2

Volume of water in the tank:

Differentiate both sides with respect to time t :

V changes at a rate of 2000 cc/min (cubic cm per minute); use this to solve for dh/dt :

(The question asks how the height changes at the exact moment the height is 50 cm, but this info is a red herring because the rate of change is constant.)