Question

Give reason it is not proper to measure quantities by using body parts as units.

Answer 1

using body parts is not appropriate because each of us has different sized hands fingers foot etc so the measurements would be different for each of us

Answer 2

THIS IS BECAUSE EVERY BODY HAS DIFFERENF MASS, HEIGHT ETC. AND EVEN EVERY BODY'S MASS DIFFER FROM TIME TO TIME . BUT THE THINGS LIKE SCALE AND OTHER MEASURING UNITS REMAINS SAME THROUGHOUT .
hope you understood it !!!!!!!!☺☺