Find the height of a cylinder with a volume of 1215pi mm and a radius of 9mm

Answer: the height would be 15

Step-by-step explanation:

v = pi*radius^2*height

1215pi mm = pi*9^2*height

1215pi mm = pi*81*height

(divide by pi on both sides, which isolates pi on both sides)

1215 mm = 81*height

(divide by 81 on both sides, which would isolate 81 on the right side of the equation)

1215/81 = 15 = height