SOLUTION: 18.When blown up, a beach ball has a diameter of 1 foot. How much air is needed to blow up the beach ball? The volume of a sphere is V = 4/3 π r3, where r is the radius (the r

Algebra ->  Circles -> SOLUTION: 18.When blown up, a beach ball has a diameter of 1 foot. How much air is needed to blow up the beach ball? The volume of a sphere is V = 4/3 π r3, where r is the radius (the r      Log On


   

Question 156885: 18.When blown up, a beach ball has a diameter of 1 foot. How much air is needed to blow up the beach ball? The volume of a sphere is V = 4/3 π r3, where r is the radius (the radius is ½ of the diameter). Leave your answer in terms of π. Give your answer in cubic feet.
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
As you know,
radius = diameter/2
AND, since the problem stated that the diameter is 1 ft:
radius = 1/2 ft
.
Plug it into:
V = 4/3 π r^3
V = 4/3 π (1/2)^3
V = 4/3 π (1/8)
V = 1/3 π (1/2)
V = 1/6 π
V = π/6