Question

Why cant we use hand span and arm length as standard unit of length​

Answer 1

Explanation:

Because the length of hand or arm differs from person to person. We need a pre-established distance to use it as the standard unit of length.

Answer 2

Answer:

hand span and arm length cannot be used as a standard unit of lenth because these are not particular measurements . like the hand span will vary from person to person and the true value would not be same.

HOPE IT HELPS YOU.......!