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BRAINLIEST ANSWER RN!!!!!!! HELP ME PLZZ!!!!!

A cylinder tube with caps on both ends is used to safely carry a rolled up poster. The tube is 42 inches tall with a radius of 1.5 inches. If one mini can of spray paint covers 150 square inches, how many mini spray cans of red paint would be needed to cover the entire tube?

A. 3
B. 2
C. 1
D. 4

Respuesta :

KingTurtleXC1
find surface area
SA=2pir^2+2hpir

h=42
r=1.5

SA=2pi1.5^2+2(42)pi1.5
SA=4.5pi+126pi
SA=130.5pi square inches


area/areacoverdperspray≤numberofsprays
130.5pi/150
2.73
so buy 3 cans because you can't get 0.73 cans

A