There are about 5 million RBC’s in a cubic millimeter of blood. If an average si

Question

There are about 5 million RBC’s in a cubic millimeter of blood. If an average sized human has 5 liters of blood, he(she) should have about _____ RBC’s. A. 5 billion B. 25 billion C. 5 trillion D. 25 trillion E. 5 quadrillion F. 25 quadrillion G. Some other number There are about 5 million RBC’s in a cubic millimeter of blood. If an average sized human has 5 liters of blood, he(she) should have about _____ RBC’s. A. 5 billion B. 25 billion C. 5 trillion D. 25 trillion E. 5 quadrillion F. 25 quadrillion G. Some other number There are about 5 million RBC’s in a cubic millimeter of blood. If an average sized human has 5 liters of blood, he(she) should have about _____ RBC’s. A. 5 billion B. 25 billion C. 5 trillion D. 25 trillion E. 5 quadrillion F. 25 quadrillion G. Some other number

Explanation / Answer

Ans- D. 25 trillion

Given that,

The average sized human has 5L of blood.

Also, the number of red blood cells in a cubic millimeter of blood is approximately 5 million .

Blood contained in body= 5L= 5×1000000 mm3 [since 1L= 1000000 mm3 ]

RBCs= 5 million= 5× 1000000 mm3

Total blood= 5× 1000000 × 5× 1000000

                 = 25× 1012

                = 25 trillion

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