#### Answer

$T=144$ square meters

#### Work Step by Step

The area of this figure can be calculated by taking the area of the large rectangle, substracting the area of the little rectangle.
The area of a rectangle can be calculated by:
$T=a\times b$ where a and b are the lengths of the perpendicular sides.
Here, the large rectangle:
$T_1=12\times 13=156$ square meters
The little rectangle:
$T_2=3\times4 = 12$ square meters.
The area of the figure:
$T=T_1-T_2=156-12=144$ square meters