Question

Directions: Modern Design magazine is having a contest to design the best ice
cube in one of three shapes—a cube, a sphere, or a cylinder. Use the following
guidelines to make your choice and complete your contest entry.
1. Find and simplify the volume-to-surface-area ratio for each of the three
possible ice cube shapes. You can use this chart.
2. Use the ratios to choose the best shape for an ice cube—a cube, sphere, or cylinder. Also, choose what you think is the best size for that shaped ice cube.
These are the directions on a project of mine and i dont understand them, please help.