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.