Which of the following are known as non-standard units?a)Handspanb)Cub...
The hand span, foot span, cubit, pace, and arm span are the five nonstandard units for measuring length.
Which of the following are known as non-standard units?a)Handspanb)Cub...
Non-standard units are units of measurement that are not commonly used or recognized internationally. These units are often based on the size or length of a specific body part or object. In the given options, all of the options (a) Handspan, (b) Cubit, and (c) Footspan are known as non-standard units.
1. Handspan:
A handspan is a unit of measurement that refers to the distance between the tip of the thumb to the tip of the little finger when the hand is spread out. It is often used to measure the width or length of small objects, such as the width of a book or the length of a pencil. However, since handspans can vary from person to person, it is not considered a standard unit of measurement.
2. Cubit:
A cubit is an ancient unit of measurement that was commonly used in many ancient civilizations, including Egypt and Mesopotamia. It is based on the length from the elbow to the tip of the middle finger. The cubit was often used to measure the height of buildings or the length of walls. However, since the length of a cubit can vary depending on the person, it is not considered a standard unit of measurement.
3. Footspan:
A footspan is a unit of measurement that is based on the length of a person's foot. It refers to the distance from the heel to the tip of the longest toe. Footspans were commonly used in the past to measure distances or to estimate the size of objects. However, like handspans and cubits, footspans are not standardized and can vary from person to person.
Therefore, all of the options (a) Handspan, (b) Cubit, and (c) Footspan are known as non-standard units because they are not commonly used or recognized internationally as standard units of measurement.