For this case we have that by definition, the area of a rectangle is given by:
[tex]A = b * h[/tex]
Where:
b: It is the base of the rectangle
h: It is the height of the rectangle
By definition we have to:
1 meter equals 0.1 decameters
1 centimeter equals 0.001 decameters
According to the data of the statement we have:
[tex]b = 18 \ cm * \frac {0.001} {1} * \frac {decametres.} {cm} = 0.018 \ decameters.\\h = 3m * \frac {0.1} {1} * \frac {decameters} {m} = 0.3 \ decameters.[/tex]
Thus, the area of the rectangle is:
[tex]A = 0.018 * 0.3 = 0.0054 \ decameters ^ 2[/tex]
Answer:
[tex]0.0054 \ decameters ^ 2[/tex]