Question

Find the surface area of a cylinder with a radius of 38 centimeters and a height of 123 centimeters

Answer 1

Hello!

To find the surface area of a cylinder you use the equation

$SA = 2 \pi rh+ 2 \pi r^{2}$

SA is surface area
r is radius
h is height

Put in the values you know

$SA = 2 \pi (38)(123) + 2 \pi * 38^{2}$

Square the number

$SA = 2 \pi (38)(123) + 2 \pi * 1444$

Multiply 38 and 123

$SA = 2 \pi * 4674 + 2 \pi * 1444$

Multiply 2 and 4674

$SA = 9348 \pi + 2 \pi * 1444$

Multiply the 2 and 1444

$SA = 9348 \pi + 2888 \pi$

Add

$SA = 12236 \pi = 38440.53$

The answer is 12236 pi or about 38440.53

Hope this helps!

Answer 2

38440.53 Is the surface area of the cylinder