A) \[50\times 1{{0}^{6}} m{{m}^{2}}\]
B) \[200\times 1{{0}^{6}}m{{m}^{2}}\]
C) \[100 \times 1{{0}^{6}}m{{m}^{2}}\]
D) \[1000 \times 1{{0}^{6}}m{{m}^{2}}\]
Correct Answer: A
Solution :
[a]| Radius of one alveolus \[=0.1\,\operatorname{mm}\] |
| Respiratory surface of one alveolus \[=4\times \frac{22}{7}\times 0.1\times 0.1\] |
| Respiratory surface of 400 million alveoli \[=4\times \frac{22}{7}\times 0.1\times 0.1\times 400\times {{10}^{6}}\]\[=50.28\times {{10}^{6}}{{\operatorname{mm}}^{2}}\]= 50.28 |
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