JAMB - Mathematics (1983 - No. 25)
If a rod of length 250cm is measured as 255cm long in error, what is the percentage error in the measurement?
55
10
5
4
2
説明
% error = \(\frac{\text{Actual error}}{\text{real value}}\) x 100
= \(\frac{5}{250}\) x 100
= 2%
= \(\frac{5}{250}\) x 100
= 2%