Answer:
S.A. = 440 m²
Step-by-step explanation:
Look at the picture.
We have the rectangle 2πr × h and two circles.
Therefore the formula of a Surface Area is:
[tex]S.A.=2\pi rh+2\pi r^2[/tex]
We have r = 5m and h = 9m. Substitute:
[tex]S.A.=2\pi(5)(9)+2\pi(5^2)=90\pi+50\pi=140\pi\ m^2[/tex]
[tex]\pi\approx3.14\to S.A.\approx(140)(3.14)\approx440\ m^2[/tex]
