Help Please!!!
A cylindrical pressure vessel has a height of 9 feet and a diameter of 6 feet. How much gas can the pressure vessel hold when full?

I know the answer is 81pi cubic ft

but not sure what formula to use to get that answer. It's not Volume of a cylinder.

Question

Help Please!!!
A cylindrical pressure vessel has a height of 9 feet and a diameter of 6 feet. How much gas can the pressure vessel hold when full?

I know the answer is 81pi cubic ft

but not sure what formula to use to get that answer. It's not Volume of a cylinder.

anonymous · Answer

It indeed is about the volume of the cyliner :

Formula - πr²h

=> π (3*3) (9) = 81π

anonymous · Answer

I was doing it wrong 
3.14*3^2*9

anonymous · Answer

Thank you

anonymous · Answer

You're most welcome :)

anonymous · Answer

@aaddiittii can you help with another one?

anonymous · Answer

A spherical water tank has a diameter of 42 feet. How much water can the tank hold when full?
is the formula V=4/3*pi*r^3
12,348 Pi cubic feet

anonymous · Answer

I'm sorry for being so late to reply @binks, but yes, you're absolutely correct - 12348π is the ans.

anonymous · Answer

@aaddiittii thank you :)

xcharlizea · Answer

its B :)