math
posted by kelly on .
A cylinder shaped sculpture is 24 meters high with a diameter of 6.8 meters. An artist plans to spray paint the entire surface with silver paint. If 1 can of spray paint covers 50 square meters, how many cans does the artist need to paint the sculpture?

Area of circle = πr^2
Perimeter of a circle = 2πr
Diameter = 2r
Paint needed = (2πr^2 + 24[2πr])/50
I'll let you do the calculations. 
5 Cans
SA=2B+PH
SA=2(pi*r^2)+(2*pi*r)H
SA=2(3.14*3.4^2)+(2*3.14*3.4)8
SA=2*36.2984+21.352*8
SA=72.5968+170.816
SA=243.4128 ft^2 
5 Cans
SA=2B+PH
SA=2(pi*r^2)+(2*pi*r)H
SA=2(3.14*3.4^2)+(2*3.14*3.4)8
SA=2*36.2984+21.352*8
SA=72.5968+170.816
SA=243.4128 ft^2
CANS=243.4128/50=5 cans 
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