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If a rod 10cm in length was measured as 10.5cm, calculate...

If a rod 10cm in length was measured as 10.5cm, calculate the percentage error

A.

5%

B.

5%

C.

8%

D.

7%

Correct answer is A

Actual measurement = 10cm

approximated value of measurement = 10.5cm

% error = Actual measurement − ApproximatedActual measure × 100

= 1010.510 × 100

= 0.510 × 100

ignore -sign i.e take absolute value

= 0.510 × 100

= 5 %