Find the area of the base of the cylinder (S), which is obtained by rotating a rectangle with sides 4 and 3 around the smaller side.

univerkov | January 5, 2021 | education

Since the axis of rotation of the rectangle is its smaller side, the radius of the circle at the base of the resulting cylinder is the larger side of the rectangle.
R = AO = 4 cm.
Determine the area of the base of the cylinder.
Sb = π * R ^ 2 = π * 16 cm2.
Then Sb / π = π * 16 / π = 16 cm2.
Answer: Sb / π = 16 cm2.

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