Question

all lengths cannot be
lengths cannot be measured in metres.​

Answer 1

Answer:

Ya,we can measure all lengths in just one standard unit of length but when it comes to large distances,calculating in metre is lengthy,so we take multiples of it like kilometre. And when calculating minute distances,it is tough to calculate in metres as it comes in decimals,so we take centimetre or millimetre

Explanation:

Answer 2

Answer:

Standard unit of measuring length is called meter. Need of standard units of measurement – we can use a variety of objects as units of measurement of length. ... But hand span, forearm length and foot step cannot be used as standard units measurements because their not the same for all the persons.

Explanation:

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