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

Question

The diameter of the average cell in the human body is 1 x 10-5 meters. The diameter of a grain of sand is about 2 x 10-4 meters. 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 the average cell in the human body is 1 x 10-5 meters. The diameter of a grain of sand is about 2 x 10-4 meters. 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.

Answer 1

To find the answer we have to divide: (2 x 10^-4)/(1 x 10^-5)=(2/1) x 10^(-4-(-5))=2 x 10^(-4+5)=2 x 10=20.