91影视

The merits of using a person鈥檚 foot as a standard are as follows:

• It is easily reproducible.
• It is cheaper than other instruments of measurement.
• It is easily accessible even to the people of the lower economic section.

The demerits of using a particular person鈥檚 foot as a standard are as follows:

• The particular person will die ultimately, and then the standard will change.
• The foot size of the person will change with age.
• The foot size may also change due to temperature, among many other factors.

The merits of using any person鈥檚 foot as a standard are as follows:

• It is easily accessible to all.
• It is cheaper than other instruments of measurement.
• It is within reach of all economic groups of society.

The drawbacks of using any person鈥檚 foot as a standard are as follows:

• Different people have different foot sizes.
• The foot size of a person changes with age.
• The foot sizes of men and women are different.