As the cone is cut at one-third height from the top (the vertex), the total volume is proportional to the cubes of the heights of the two parts. Ratio of volumes two parts =(
1
3
)3:13=1:27 Hence the bottom part will have volume of 27−1 i.e., 26 parts. Given (26−1) i.e., 25 parts −225cc. Hence the required answer is 27 parts =