FLAKERZZ FLAKERZZ
  • 04-04-2019
  • Mathematics
contestada

If a wheel has a diameter of 15 centimeters what is the area of the wheel nearest centimeter

Respuesta :

gmany
gmany gmany
  • 08-04-2019

Answer:

A = 177 cm²

Step-by-step explanation:

A diameter is two times longer than a radius. Therefore, if the diameter

d = 15cm, then the radius r = (15cm) : 2 = 7.5cm.

The formula of an area of a circle:

[tex]A=\pi r^2[/tex]

Substitute:

[tex]A=\pi(7.5)^2=56.25\pi\ cm^2[/tex]

[tex]\pi\approx3.14[/tex]

Then

[tex]A\approx(56.25)(3.14)\approx177\ cm^2[/tex]

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