A cell is 30 µm in width. Assume that the cell is cube shaped. What would be the length of the side of the cell if you wanted to double the surface area to volume ratio of the cell?

The earth's inner core is the earth's innermost part. it is primarily a solid ball with a radius of about 1,220 km (760 miles), which is about 70% of the moon's radius.[1][2] it is composed of an iron–nickel alloy and some light elements. the temperature at the inner core's surface is approximately 5,700 k (5,430 °c), which is about the temperature at the surface of the sun. 

What are your option’s