[Solved] Starting position of an object is represented as x=5.1±0.2m and finishing position as y=6.9±0.3m. What will be the displacement and error in displacement?

Q.	Starting position of an object is represented as x=5.1±0.2m and finishing position as y=6.9±0.3m. What will be the displacement and error in displacement?
A.	displacement = 1m, error = 0.5m
B.	displacement = 2m, error = 0.36m
C.	displacement = 1.8m, error = 0.36m
D.	displacement = 1.5m, error = 0.4m
Answer» C. displacement = 1.8m, error = 0.36m
Explanation: displacement between two positions represented as x±Δx and y±Δy is iy-xi and error in displacement is (Δx2 +Δy2)1/2.

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