Question

I need some help please

Answer 1

Answer:

$2261.9cm^{2}$

Step-by-step explanation:

Total Surface Area of Cylinder = $2\pi rh+2\pi r^{2}$

Note: Do not get tricked by the 24cm (taking 24cm as the radius), that is the diameter.

To find r, radius = $\frac{1}{2} d$

                          =$\frac{1}{2} (24)$

                          = 12cm

Now we know r = 12cm, h = 18cm

Now we substitute r and h into the formula to find the total surface area.

Total Surface Area of Cylinder = $2\pi (12)(18)+2\pi (12)^{2} \\=432\pi +288\pi \\=720\pi cm^{2} \\=2261.9cm^{2}$