Q. 73.6( 11 Votes )

Measure of two qu A. (0.25 ± 0.08) m

B. (0.25 ± 0.5) m

C. (0.25 ± 0.05) m

D. (0.25 ± 0.135) m

Answer :

Given,




Let, X=AB


X=AB=


Precision can be calculated by,


If is the error in the X, be the error in A and be the error in B, then relative error is calculated as .


Therefore now,


(For the formula part refer to


NCERT class 11 part 1 unit


and measurement chapter)




Rounding off 0.075 to two significant figures we get,



Therefore, the value of AB is .

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