Question

Convert the following quantity as indicated:
20cm into m

Answer 1

Hint: Length: Length is a term used for identifying the size of an object or distance from one point to another. It is a physical quantity of distance. The SI unit of length is meter (m) and it is denoted by ‘l’. Length is a scalar quantity. There are various units in length conversion are meter, centimeter, millimeter etc.

Complete step by step solution:
Meter: Meter is the SI unit of length and it is denoted by ‘m’.
Centimeter: Centimeter is the hundredth part of the meter. It is also a base unit in the C.G.S. system where C is centimeter, G is gram and S is second.
We know that,
\[ \Rightarrow 100cm = 1m\]
So 20cm is equal to
\[ \Rightarrow 20cm = 0.2m\]

Note: Centimeter and millimeters are derived unit of meter where centimeter is hundredth part of meter and millimeter is tenth part of centimeter. Or we say that a millimeter is a thousandth part of a meter. Scalar quantities are those having only magnitude not direction.