Question

Help find the surface area of a cylinder with the height of 9 inches and base radius of 4

Answer 1

Answer:

326.73

Step-by-step explanation:

You just have to plug this into the cylinder surface area formula, which is $A=2\pi rh+2\pi r^{2}$. So solving this would be $A=2\pi (4) (9) +2\pi (4)^{2}$. You can simply put that into your calculator, and you'll get 326.72564, which rounds to 326.73. Make sure to read your problem carefully in case it specifies what number to round to though.

Answer 2

9514 1404 393

Answer:

  104π in² ≈ 326.7 in²

Step-by-step explanation:

Put the given numbers in the surface area formula for a cylinder.

  SA = 2πr(r +h)

  SA = 2π(4 in)(4 in +9 in) = 104π in² ≈ 326.7 in²