Find the surface area of the cone frustum generated by revolving the line segment y = (x/2)

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Find the surface area of the cone frustum generated by revolving the line segment y = (x/2) + (1/2), 1 ≤ x ≤ 3, about the x-axis. Check your result with the geometry formula 

Frustum surface area = π(r1 + r2) * slant height.

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Thomas Calculus Early Transcendentals

ISBN: 9780321884077

13th Edition

Authors: Joel R Hass, Christopher E Heil, Maurice D Weir

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