Question

A __ cannot be a sandard unit for measuring length ​

Answer 1

Answer:

'hand-span', 'forearm length' or ' foot step'

hope it helps you

mark me as the brainliest

Answer 2

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.