Answer:
[tex]\boxed{\text{\sf \Large 138.6 mm^2 $}}[/tex]
Step-by-step explanation:
Area of rectangle
[tex]15 \times 5=75[/tex]
Area of circle (semi-circle+semi-circle)
[tex]r=(15-3-3) \div 2 = 4.5[/tex]
[tex]\pi \times 4.5^2=20.25\pi[/tex]
Add both areas
[tex]20.25\pi +75[/tex]
[tex]20.25 \times 3.14 +75=138.585[/tex]
