42 feet is how many km?
Answer: 0.012801599590349 km
1 feet is equal to 0.0003047999902464 km: 1 feet = 0.0003047999902464 km
How to convert 42 feet to km?
We have: 1 feet = 0.0003047999902464 km
42 feet = ? km
= 42 / 0.0003047999902464
= 0.012801599590349 km
Thus, to solve the problem we multiply 42 feet by 0.0003047999902464 km: 42 x 0.0003047999902464 = 0.012801599590349 km
The answer is 0.012801599590349 km
The adding informations:
A Foot is a metric unit which is used to measure the length of objects and large distances. Moreover, it is defined as the unit of length in the International System of Units (SI) as well. The symbol of Foot is feet.
A brief history of The International System of Units (SI):
The length of an object is the distance from one point of that object to another point of it. It simply provides how long the object is.
A long time ago, the human body was used as the reference for the length, such as foot, inch, yard. The method for determining base units of length has changed significantly over time.
Back in time, there are no standar system of measurement and it made many difficulties in trading between nations. To solve that problems, a group of French scientists had invented The International System of Units (SI) in an effort to make a standard measurement system. The metric system was not successful at the first time. Napoleon eliminated it in 1812, and it was only reinstated in 1840.
It took more than three-quarters of a century after its official adoption in France for leaders from 17 countries to sign the worldwide Treaty of the Meter in 1875, thus standardizing metric systems was used around the world.