Multiple choice

4The volume of the frustum of a cone is $600 m$$^3$ and its height is $12 m$, bottom radius, $R = 2 m$. Find its top radius, $r$. (Use $\pi$ = 3.14).

  1. $5.7$ m
  2. $4.9$ m
  3. $3.5$ m
  4. $6.2$ m
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A Correct answer
Explanation

Using the frustum volume formula, 600 = (3.14 × 12/3)(R^2 + Rr + r^2). With R = 2, this gives r approximately 5.69 m, which rounds to 5.7 m.

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