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Grade: 11
        
the area of a square is calculated as (100+-2)cm2.the measured value of its length
7 months ago

Answers : (4)

Khimraj
3008 Points
							
error in area = (2/100)*100 = 2%
error in area = 2*(error in length of side)
so error in length of side = 1%
so length odf side is 10 \pm 0.1 cm
Hope it clears....................
7 months ago
Arun
21973 Points
							
Dear student
 
If area is 100 cm²
 
Then length = sqrt (100) = 10 cm
 
Hope it helps
 
Regards
Arun (askIITians forum expert)
7 months ago
Arun
21973 Points
							
Dear student
 
I forgot about error there will be an error of 1 % also as area has 2% error.
Hence
Length = 10+- 0.1 cm
7 months ago
Umesh lahoti
16 Points
							
Maximum error in length=0.1cm
By error analysis-  2/100=2×0.1/x
Now x= 10
 
Measured value of length=(10+-0.1)
 
7 months ago
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