Answer:
C
Step-by-step explanation:
Rectangle 1: 6*4=24
Rectangle 2: 4*8=32
Rectangle 3: 4*10=40
Right triangle: 6*8/2=24
Total surface area is
24+32+40+24*2 =144
Hypotenuse is calculated by Pythagorean theorem
https://en.wikipedia.org/wiki/Pythagorean_theorem
[tex]\sqrt{6^{2} +8^{2} } =10[/tex]
