# Which of the following body parts are used as non-standard units of length? I. Fathom II. Hand III. Cubit IV. Finger

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Which of the following body parts are used as non-standard units of length?

I. Fathom

II. Hand

III. Cubit

IV. Finger

1. II, III and IV
2. I, II and III
3. I, II, III and IV
4.  I, III and IV

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Correct Answer - Option 3 : I, II, III and IV

Measurement is the comparison of an unknown quantity with a known quantity.

• Standard Unit of Length: When a unit is accepted by the majority of people, it is called a standard unit of measurement. Example, kilogram, metre, etc.
• Non-Standard Unit of Measurement: Those units which are not accepted by majority of people are called non-standard unit of measurement. For example,
• Fathom: It is used for specification in marine depth, usually, 1 fathom (ftm) = 6 feet = 1.8288 metres
• Handspan: When your fingers are stretched out, the length between your little finger and thumb is called a handspan.
• Cubit: The length from your elbow to your middle finger is used for measurement
• Finger: Smaller objects can be measured using finger

Hence, we conclude that fathom, hand, cubit, and finger are used as non-standard units of length.