To find the total volume of the cylinder you would use the formula V = pi x r^2 x h. When you substitute the values, you would have 3.14 x 5^2 x 30 (make sure you use half of the diameter to represent the radius). This would give us a volume of approximately 2355 cubic centimeters. Because it is only 30% full, you will need to multiply the total volume of 2355 cubic cm by the part that is represented by 30% (0.30 or 30/100). 0.30 x 2355 = 706.5 cubic cm. That is the answer!
