Find the area of the surface generated when the given curve is revolved about the x-axis. y = 4x+6 on [0, 3] The area of the generated surface is square units. (Type an exact answer, using π as needed.)
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Find the area of the surface generated when the given curve is revolved about the -axis.
The area of the generated surface is square units.
(Type an exact answer, using as needed.)