49. The volume, V, of a right circular cylinder with radius r and height h is given by the formula V= πr2h. The right circular cylinder shown below has radius R and height H. A second right circular cylinder has radius 2R and height 3H. The volume of the second right circular cylinder is how many times the volume of the first right circular cylinder ?
Your Answer is
Correct Answer is D
Explanation
Using the volume formula, the volume of the first cylinder can be obtained as V=πR2H, and the volume of the second cylinder is V=π4R23H=12πR< sup>2H. The second volume is 12 times that of the first. Choose D.