The greatest possible error if Jamal measures the length of the walkway as 15.5 meters is 0.05 m. Hence, option A is the correct answer.
How to calculate the range of estimated measurement from percent error?
If the measurement of the object is measured to be M, and the percent error in the measurement is estimated to be E%, and O is the original measurement of the object being measured then;
[tex]\rm M \in O \pm E\% \: \rm of \: \rm O[/tex]
where O is the original measurement of the object being measured.
Which decides the range of values in which the original measurement can fall in.
[tex]\rm [ O - \text{E\% of O}, \: \: O + \text{E\% of O}][/tex]
Thus, the greatest possible error if Jamal measures the length of the walkway as 15.5 meters is 0.05 m.
Hence, option A is the correct answer.
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