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UPSC Civil Service Exam Questions - Engineering

Q1:

A plot of land 60°m x 20 m is measure steel tape. If the standard error of length width measurements is taken as ± 1 cm, the standard error of the area of the plot be

A ± 0.1414 m2

B ± 0.566 m2

C ± 0.632 m2

D ± 0.8484 m2

ANS:C - ± 0.632 m2

@All.

Simple Formula to remember;

Error in Area= {(error in length + length of plot) ^2 + (error in width + width of plot) ^2}.

And then take the square root of the result.