Hint: The most common units of length in the whole world are kilometre, metre, foot, yard, inch, and miles. Different countries in the world have different local units of measurement of length. However, for scientific purposes, only the International System unit or the SI unit is supposed to be used.
Complete step-by-step answer:
The foot-pound-second (fps) system of units is the scheme used for measuring the dimensional and material quantities. The fundamental units of the FPS system are the foot for length, the pound for weight, and the second for time.
However, the FPS system has two different variants, namely, the American version and the Imperial (British or UK) version. But, the International System of units decided unanimously to select the unit of metre as the standard for scientific computations whereas even today, the units like foot, inch and miles are used in the construction industry and measurement of distances in the USA.
The definitions of one foot is as follows:
One foot (1 ft) represents a length of 12 inches. The inch was originally defined as the length of three typical barleycorns laid end-to-end. A foot was also approximately equal to three hand widths or 2/3 of a cubit (the distance from an average person's elbow to the tips of the fingers)
The conversion from foot to the SI units are as follows:
1 inch = 2.54 cm
12 inches = 1 foot
Hence,
1 foot = 30.48 cm
Also,
1 foot = 0.304 m
The correct option is Option A.
Note: The unit metre was adopted into scientific notations owing to the ease of defining it in terms of standards. For example, in the year 1793, the metre was defined as one-millionth of the distance travelled from the equator to the North Pole.
Even though England along with the rest of Europe and its colonies adopted the metric system, three countries in the world still, use the imperial FPS system for official and conventional purposes. They are: United States of America, Liberia, and Myanmar.
