The diameter of a water bottle is 2.4 centimeters. The height is 10.3 centimeters. What is the volume?Also Why does the formula for the volume of a cylinder include π r^2( Pie, R to the 2nd power )

The diameter of a water bottle is 24 centimeters The height is 103 centimeters What is the volumeAlso Why does the formula for the volume of a cylinder include class=