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Marcellus and Albert were working out at the Geometrically-Ideal Super Gym where all the dumbbells were constructed according to the model shown below.

  1. Find the volume of the dumbbell pictured above.
  2. Suppose that they needed a dumbbell suitable for bench pressing 200 pounds and $h=4 \text{feet}$, what should the density of the material used to make the dumbbell be?
  3. Ramiro joins the group and wants to sketch funny pictures on the dumbbells, how much drawing space does he have on the dumbbell shown above?



Tags: volume-of-revolution, surface-of-revolution, physics-application, geometry, composite, root, multistep, computation, v--a, t3, c2
Hmm. I don’t know where the picture went (it wasn’t in the original TeX file, so it must have been cut and pasted by hand). Presumably it’s a shape that’s a simple function revolved around the x-axis. – Eric Hsu 2008-07-12 21:28