Physics And Measurement Question 292

Question: Area of a square is $ \text{(}100\pm 2\text{)}m^{2} $ . Its side is

Options:

A) $ \text{(}10\pm 1\text{)}m $

B) $ \text{(}10\pm 0.1\text{)}m $

C) $ \text{(}10\pm \sqrt{2}\text{)}m $

D) $ 10\pm \sqrt{2}% $

Show Answer

Answer:

Correct Answer: A

Solution:

[a] $ Area={{( Length )}^{2}} $

$ or~~length={{( Area )}^{1/2}}={{( 100\pm 2 )}^{1/2}} $

$ ={{(100)}^{1/2}}\pm \frac{1}{2}\times 2=(10\pm 1)m $



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