How can knowing the gcf and lcm you when you add, subtract and multiply fractions?

Could somebody me with this radical simplification?

The cone in the diagram has the same height and base area as the prism. what is the ratio of the volume of the come to the volume of the prism? base area=b base area =b volume of cone volume of prism 1 2 volume of cone volume of prism 1 3 volume of cone volume of prism 2 3 2019 edmentum. all rights reserved us - 12: 00 dit

Asap 25 pts + brainliest to right/best answer only answer if you know for sure