We were told it is 2 centimeters. Our height right over here, we know it is 2 centimeters. So the only unknown we have over here is a rate at which our height is changing with respect to time, which is exactly what we needed to figure out in the first place. So we just have to solve for that. So we get 1 cubic centimeter. Let me make it clear. We get 1 cubic centimeter per second.