I need some help please

Mathematics

1 answer:

aliina [53]2 years ago

4 0

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 = $2\pi (12)(18)+2\pi (12)^{2} \\=432\pi +288\pi \\=720\pi cm^{2} \\=2261.9cm^{2}$

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I hope this helps. If not, feel free to leave a feedback. also leave a comment if it helped.