Question #3052f

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Answer 1 · 2017-04-20T17:22:34

Look at the Volume and Surface Area formulas.

You may do the same work beginning with V = 256.
Find r using the volume formula:
$V = (4/3)pir^3$
$256 = 4r^3$
$64 = r^3$
$4 = r$

Substitute into the Surface Area formula:
$SA = 4pir^2$
$= 12(4)^2$
= 12*16
= 192 square feet.

Answer 2 · 2017-04-20T17:33:05

$192 ft^2$

Surface area of a sphere is $4 pi r^2$ and
volume is $4/3 pi r^3$

Using $pi$ =3 the volume would be $4r^3=256$ .

This would give r=4 and thus surface area= $4pi r^2= 4(3)4^2=192ft^2$ approx