Answer
$V = 5.0\times 10^{-3}~m^3$
Work Step by Step
We can estimate the volume of blood in the human body as:
$V = L\times A$
$V = L\times \pi~R^2$
$V = (10^8~m)(\pi)(4\times 10^{-6}~m)^2$
$V = 5.0\times 10^{-3}~m^3$
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