The answer is two because the value of 18 divided by 9 equals two
20%
source= 8/10 is 80% so you take the remaining 20% which is the percent of increase
B(cone)=B(pyramid)=r²π
V(pyramid)=1/3 * B * H = 1/3 * r² π * 3 r ( 3 will cancel out )= r³ π
Answer: r³ π
