1 Answer

Mike Lui · Answer 1 · 2023-12-17T07:19:05+0000

Notice that the area is equivalent to the area of the complete rectangle minus the area of the 3km x 4km rectangle.

$A=TA-AS\text{.}$

Now, the area of a rectangle is given by the following formula:

$A=\text{width}\cdot\text{lenght.}$

Therefore:

$A=9km\cdot16km-3km\cdot4km\text{.}$

Simplifying the above result, we get:

Answer:

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