Question

mention the precautions to be observed while measuring the length of a pencil using a ruler ​

Answer 1

Explanation:

the precautions are:

the level of eye and level of scale mark should be perpendicular to each other.

the zero of scale should coincide with starting point.

it should be straight along the line.

Answer 2

you must take hold pencil and ruler strait.

Ruler must hv right measurement units on it

look carefully and mark the measurement