Question

Give reasons.
(a) It is not proper to measure quantities by using body parts as units.
(b) It is necessary to get the weights and measures standardized at regular intervals.

Answer 1

(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.