A) 13 : 56
B) 28:51
C) 31 : 39
D) 22 : 31
Correct Answer: B
Solution :
Size of red blood cell = 0.000007 m Size of plant cell = 0.00001275 m \[\text{Required ratio=}\frac{\text{Size of Red blood cell}}{\text{Size of Plant cell}}\] \[\text{=}\frac{0.000007}{0.00001275}=\frac{7\times {{10}^{-6}}}{1.275\times {{10}^{-5}}}\] \[=\frac{7}{1.275}\times {{10}^{-6+5}}=\frac{0.7}{1.275}=\frac{28}{51}\]
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