A cylindrical water tank has a radius of 6 feet and a height of 20 feet. A larger tank with the same radius has a volume that is 2 times the volume of the smaller tank. What is the height of the larger tank?

Question

anonymous · Answer

an easy way to remember this cylinder formula is this! you know the area of a circle right?

anonymous · Answer

no my teacher is dumb

anonymous · Answer

the area for a circle is $$\pi r ^{2}$$ how many circles would it take to fill the tank 20 feet high? 20 feet worth of course! soooo for a cylinder 
V= $$\pi r ^{2}h$$

anonymous · Answer

first we need to find the volume of the first one. we have the radius and we have the height right!? so lets plug em in!

anonymous · Answer

$$v = \pi 6^{2} * 20$$v=pi r^2 *h

anonymous · Answer

solve that, then double that value and remember that we already have the radius so we need to solve for h