The lengths of the sides of a rectangle are 18cm by 3m. Express the area of the rectangle in square decametres.

For this case we have that by definition, the area of a rectangle is given by:

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:

Thus, the area of the rectangle is:

the answer will be the last one