Answer:
The correct answer is -
1. 1 grain of sand = 244 red blood cells.
2. 1 penny = 2439
Explanation:
A normal red blood cell has a normal disk diameter of 6.2 - 8.2 micron or micrometer is way small than a grain of sand which ranges in diameter from 0.0625 mm (or 1⁄16 mm) to 2 mm. The size of the diameter of a penny is given 0.02 m.
Let take the highest value of them:
RBC = 8.2 micrometer
The grain of sand = 2 mm
Penny = 0.02 m
we know:
1 meter = 10e+6 or 100000 micron
1 millimeter = 1000 micron
then, the grain of sand = 2* 1000 = 2000
so, the 1 grain sand = 2000/8.2
= 244
Similarly,
Penny = 0.02*100000= 20000
= 2439
Thus, the correct answer is =
1. 1 grain of sand = 244 red blood cells.
2. 1 penny = 2439
