Answer:
240.37 cm^2
Step-by-step explanation:
The question is on the mensuration of solids, a cylinder
Given data
height of cylinder h= 4 cm
diameter d= 9 cm
radius = d/2= 9/2= 4.5 cm
we know that the surface area of cylinder is
[tex]SA= 2\pi r h+ 2\pi r^2[/tex]
Substituting our data into the expression we have
[tex]SA= 2*3.142 *4.5* 4+ 2*3.142 4.5^2[/tex]
[tex]SA= 113.12+ 127.25\\\\SA= 240.37 cm^2[/tex]
Therefore the total surface area is 240.37 cm^2
