# A tube has a radius of 9 inches and a height of 7 inches. What's its approximate volume?

1,781.28

Explanation

For cylinders, $$\text { Volume }=\pi r^{2}(h)$$. In this problem, $$\text { Volume }=\pi 9^{2}(7)$$ . If you assume π is approximately 3.14 then V is approximately equal to (3.14)(81)(7) or 1,781.28 cubic inches.