Need help with image below

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

What is the value of x in the diagram below?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?