a cylindrical paint roller has a length of 10 inches and a diameter of 1 1/2 inches. As the roller is dragged along a wall, if i
t completes 4 revolutions, what is the approximate area the roller will cover with paint?
1 answer:
I hope this helps you
radius= 1 1/2=1.2+1/2=3/2
lateral area= 2pi.r.height
area= 2.pi.3/2.10
area =30pi
4.30pi=120pi
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