elenaridley
elenaridley elenaridley
  • 26-03-2020
  • Mathematics
contestada

Find the surface area in terms of pl.
3cm
4 cm

A. 12π
B. 16.5π
C. 4.5π
D. 22π​

Find the surface area in terms of pl3cm4 cmA 12πB 165πC 45πD 22π class=

Respuesta :

thamimspartan thamimspartan
  • 04-04-2020

(B) 16.5π

Explanation:

The shape given is a cylinder

The height, h of the cylinder = 4cm

Diameter of the cylinder = 3cm

Radius, r = 1.5 cm

Surface area of cylinder, A = ?

We know:

Surface area of cylinder = 2πrh + 2πr²

[tex]A = 2\pi r (h+r)\\\\A = 2 X \pi X 1.5 ( 4 + 1.5)\\\\A = 16.5\pi[/tex]

Therefore, the surface area would be 16.5π

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