Question

A __ cannot be a sandard unit for measuring length ​

Answer 1

Answer:

Foot Step

Explanation:

We can measure the length of an an object by using 'hand-span', 'forearm length' or ' foot step' as the units of measuring length. But hand span, forearm length and foot step cannot be used as standard units measurements because their length is not the same for all the persons.

Answer 2

Hand span method cannot be