Question

The length and width of a rectangular window pane measured to the nearest millimeter are 8.6cm and 5.3 respectively. Find to four significant figures, the percentage error in the area of the window pane.

Answer 1

Maximum area ⇒ 8.65 x 5.35 = 46.2775
Actual area ⇒ 8.6 x 5.3 = 45.58
Minimum area ⇒ 8.55 x 5.25 = 44.8875
Absolute error = 46.2275 – 44.8875
                                 2
% error = 0.695 x 100%
               45.58
= 1.525%