victor and wel are both draining the water from aquariums. the function V = -4t + 190 gives the volume, in liters. when the smaller tank is emptied, how much water remains in the other tank? help!

Acone is placed inside a cylinder. the cone has half the radius of the cylinder, but the height of each figure is the same. the cone is tilted at an angle so its peak touches the edge of the cylinder’s base. what is the volume of the space remaining in the cylinder after the cone is placed inside it?