Question

A cubit and a foot cannot be used as a standard unit. Why?

Answer 1

1. Cubit is the distance from the elbow of a hand to the middle finger.
2. And foot is the distance from the heel to the big toe of a foot.
3. Hence their lengths are not the same for all the persons and it varies from person to person.
4. Thus, cubit and foot are not standard units of measurement.