Question

in order to find the volume of wire,why the observation of radius should taken with very high accuracy?​

Answer 1

Answer:

This produces a large number for length, but it's easier to work with than the extremely small number you'll get for diameter if you convert it to meters or feet.

Even after when the zero error is nil, this fact too should be recorded. ... Apply the zero correction with its proper sign to the mean observed diameter and find the correct diameter.

Thanks!!