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

Options

A. 4.9 cm
B. 4.805 cm
C. 5.25 cm
D. 5.4 cm

Answer

A

Explanation

Given length l = 5 cm Now, checking the errors with each option one by one, we get
`Deltal_(1) = 5 -4.9 =0.1 cm`
`Deltal_(2) = 5 - 4.805 = 0.195 cm`
`Deltal_(3) = 5.25 - 5 = 0.25 cm`
`Deltal_(4) = 5.4 - 5 =0.4 cm`
Error `Deltal_(1)` is least
Hence, 4.9 cm is most precise.