Question

It is not proper to measure quantities by using body parts as units. Give reasons.

Answer 1

Answer ⇒ Body parts are not of constant length or constant mass. 

Explanation ⇒
It is not proper to measure the quantities by using the body parts because body parts are different for different person.

''I means to say that the mass of the body parts for all the persons are different from each other. ''

''Thus, we cannot compare and measure the mass.'' 

''Also, the length of the body parts for the particular person differs from each other. Thus, we cannot even compare the length and measure it.'' 

Hence, It is not proper to measure the quantities by using the body parts as units. 


Hope it helps.

Answer 2

Explanation:

(a) It is not proper to measure quantities by using body parts as units because these are not reliable and unique. These units of measurement vary from person to person.

(b) Because of difference in physical conditions from place to place, the reference chosen as units for weights and measures varies. So, it becomes necessary to get the weights and measures standardized at regular intervals.