How many times longer is the diameter of a grain of sand than the diameter of the average cell in the human body Show your work.?

The diameter of a grain of sand typically ranges from about 0.05 mm to 2 mm. The average diameter of a human cell is approximately 10 to 30 micrometers (0.01 to 0.03 mm). Taking an average sand grain diameter of 1 mm and an average human cell diameter of 20 micrometers (0.02 mm), the ratio is 1 mm / 0.02 mm = 50. Therefore, the diameter of a grain of sand is about 50 times longer than the diameter of the average human cell.