an open tank has tge shape of circular cone. the tank is 8feet across the top and 6 feet high. watwr is pumped through the buttom of the tank. how much work is done to fill the tank from a depth of 4 feet to a depth of 6 feet? water weighs 62.4 pounds per cubic foot

Step-by-step explanation:

We are given that

Height of tank=6feet

Diameter of tank=8 feet

Radius of cone,r=d/2=8/2=4 feet

Let  a layer of thickness dy at distance yr from the bottom at origin

y=6 feet

Using similar triangle property

Weight of water=62.4 pounds per cubic foot

Now,

Weight of layer=

Now, work done to fill the tank from a depth of 4 feet  to a depth of  6 feet is given by

the answer on e2020 is

10

4/5

3/5

4/3

step-by-step explanation:

i need a picure

step-by-step explanation: