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2014-07-28T18:54:28+05:30

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Density of cube = d  = mass / Length³
 %error in mass = Δm * 100 / m = 2
ΔL * 100 / L  = 3
Δd  * 100 /d  =   percentage error in density  =
             sum of    % error in mass    and    3 times  % error in Length
               =  2  +  3 * 3  =  11 %

RULE :  F  =  A^n  *  B^m  / C^p    then
  % error  in F  =    n * %error in A    +    m * %error in B    +  p  *  % error in C
  Relative errors are all added in the same way.

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