Question

a cylinder has a radius of 4 centimeters and a height of 40 centimeters

Answer 1

Volume:
$V = b * h \\ V=( \pi r^{2} )*h\\V=(\pi4^{2})*40\\V=640cm^{3}$

Surface Area:
SA = base + base + side
SA = $2(\pi r^{2})+($Circumference$*h$
SA = $2(\pi r^{2})+(2\pi r)*h$
$SA=2(\pi(4^{2}))+(2\pi (4))*40\\ SA=32\pi + 8\pi*40\\ SA=32\pi+320\pi \\ SA=352\pi=1005.309cm^{2}$