WAEC - Mathematics (1993 - No. 5)
A stick of length 1.75m was measured by a boy as 1.80m. Find the percentage error in his measurement
27/9%
26/7%
5%
277/9%
284/7%.
Εξήγηση
% error = \(\frac{error value}{true value}\) x 100%
% error = \(\frac{1.80 - 1.75}{1.75}\) x 100% = \(\frac{0.05}{1.75}\) x 100% = \(\frac{20}{7}\)% = 2\(\frac{6}{7}\)%