A surveyor needs the combined length of three sections of a trench
PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
A surveyor needs the combined length of three sections of a trench.
Section A: 2.45 m
Section B: 35.0 cm
Section C: 560 mm
(i) Convert the lengths of Sections B and C to metres, retaining the correct number of significant figures.
(ii) Add the three lengths and express the total in metres with the appropriate precision.
(iii) Rewrite the result of (ii) in millimetres, again observing the correct significant‐figure rule for addition/subtraction.