Answer: Your answer would be 152 cm
Explanation:
Outer part of the shape:
Length = 18 cm
width = 12 cm
Area of large rectangle = (18 ⋅ 12)
= 216 cm2------(1)
Inner part of shape:
Length = 6 cm
width = 3 cm
Area of small rectangle = (8 ⋅ 8)
= 64 cm2------(2)
(1) – (2)
= (216 – 164) cm2
= 154 cm2
I hope this helps!