Question

Assuming that 1 foot is approximately equal to 0.3m and the height of Martin is 6 feet, calculate his height in metres.
A. 1.8
B. 2
C. 18
D. 20

Answer 1

Hint: Here we have to convert the given quantity from one unit of measurement into another. Both feet and metres are common units of measuring heights of human beings and also, they are used in measurement in everyday life.

Complete step by step answer:
It is given that my foot is approximately equal to 0.3 metres. Rewriting this mathematically,
1ft= 0.3m
Now we are given that the height of Martin is 6 feet and we need to convert this height into metres.
1ft= 0.3m
\[6ft=0.3\times 6=1.8m\]
Thus, the height of Martin is 1.8 m

So, the correct answer is “Option A”.

Additional Information:
The meter is one of the most fundamental units of measurement of length. In dimensional analysis it is amongst the seven fundamental quantities. When we say it is one of the seven fundamental units in the dimensional analysis, we mean that we cannot derive it by using any other quantity. Using metre for measurement of length first started in France early after the great French Revolution in 1700. Also, it is the SI unit of measurement of length and all international measurements which are not so big are measured in terms of metre. Contrary to this foot is an older quantity of measurement of length and was extensively used by the Greeks, Romans, Chinese & French to measure length.

Note:
It is evident from the question that meter is a bigger quantity in comparison to feet. When we change a bigger unit into a smaller unit, we use multiplication and when we convert a smaller unit into a bigger unit, we use division.