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 $
