lisa200592
lisa200592 lisa200592
  • 21-02-2015
  • Mathematics
contestada

What is the exact volume of the cone, height is 16ft and the radius is 5 ft.

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heyDB
heyDB heyDB
  • 21-02-2015
V=π r^2h/3

V = 
π r 5^2 16/3

Raise 5 to the power of 2 to get 25.
V=π*25*16/3

Move 25 to the left of the expression π⋅25.
V=25*π*16/3

Multiply 25 by π to get 25π.
V=25π*16/3

Multiply 25π by 163 to get 25π(16/3).
V=25π(16/3)

Simplify

Multiply 16 by 25 to get 400. 
V=(400/3)π 

Combine 400/3 and π/1 to get 400π/3.


V=400π/3
 
V≈418.8790


Answer Link
Panoyin
Panoyin Panoyin
  • 22-02-2015
V = 1/3πr²h
V = 1/3(3.14)(5)²16
V = 1/3(3.14)(25)(16)
V = 1/3(3.14)(400)
V = 1/3(1256)
V ≈ 418.67ft³
Answer Link

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