Asked by Perlie
The radii of two spheres are 4ft and 8ft find the volume of a spheres whose surface area is equal to the sum of the surface areas of these two spheres.
Answers
Answered by
Damon
V = (4/3)pi r^3
A = 4 pi r^2
4 pi r^2 = 4 pi (16) + 4 pi (64)
r^2 = 80 = 16*5
r= 4 * sqrt 5
so
(4/3) pi [ 4^3 *5 sqrt 5 ]
A = 4 pi r^2
4 pi r^2 = 4 pi (16) + 4 pi (64)
r^2 = 80 = 16*5
r= 4 * sqrt 5
so
(4/3) pi [ 4^3 *5 sqrt 5 ]
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