SOLUTION: the surface area of a sphere varies directly with the square of its radius. when the radius of a sphere mesures 2 meters, the surface area mesures 16 square meters. find the surfac

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Question 1052578: the surface area of a sphere varies directly with the square of its radius. when the radius of a sphere mesures 2 meters, the surface area mesures 16 square meters. find the surface area of fa sphere with a radius of 3 meters
Found 2 solutions by addingup, advanced_Learner:
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
4Pir^2
4*3.1416*9 = 113.1

Answer by advanced_Learner(501) About Me  (Show Source):
You can put this solution on YOUR website!
let S be the surface area of a sphere.
S
S=KR%5E2
16=K%282%29%5E2
SOLVE for K
16=K%284%29
4=K
NOW IF Radius is 3 meters.
S=K%283%29%5E2
S=K%289%29
S=4%2A%289%29
S=%2836%29