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  • The mean length of an object is 5 cm. Which of the following measurements is most accurate? a) 4.9 cm b) 4.805 cm c) 5.25 cm d) 5.4 cm

The mean length of an object is 5\; cm. Which of the following measurements is most accurate?

a) 4.9\; cm

b) 4.805\; cm

c) 5.25\; cm

d) 5.4\; cm

Answers (1)

The answer is the option (a) 4.9 cm

Explanation : \left | \Delta a_{1} \right |=\left | 5-4.9 \right |=0.1cm,\left |\Delta a_{2} \right |=\left | 5-4.805 \right |=0.195\; cm

                       \left | \Delta a_{3} \right |=\left | 5-5.25 \right |=0.25cm,\left |\Delta a_{4} \right |=\left | 5-5.4\right |=0.4\; cm

Thus,\left | \Delta a_{1} \right | it is the most accurate.

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