Question

The dimensions of a brick are 2cm x 3.4cm x 6.42cm. Find the percentage error in the calculation of its area.        

Answer 1

Relative error = ^0.5/₂ + ^0.05/_3.4 + ^0.005/_6.42 = 0.26548 
Working Product = 2 x 3.4 x 6.42 =43.656
Percentage error = ^0.26548/ _43.656  x 100 = 0.608%