A Brian's Candy Sugar Wand Is Made from Flavored Sugar $V=\pi r^{2} h$

Essay

A Brian's candy sugar wand is made from flavored sugar inside a straw.The straw is 210 mm long and 5 mm in diameter.The child accidentally poked a hole in the bottom, making the height of the sugar fall at a rate of 1 mm per second.The child realizes that there is a hole after 1 seconds.What was the rate of change of the volume of the sugar at this time?
[ $V=\pi r^{2} h$ ]