The radius of a cylinder is halved and the height is tripled. What is the area of the curved surface when compared to the same area previously?


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Answer:

1.5 times

Step by Step Explanation:
  1. The curved surface area of a cylinder is 2πrh.
  2. If the radius is halved and the height is tripled.
  3. Putting this into the formula, we see that the curved surface area becomes:
    2π ×  
    1
    2
      × r × 3 × h
    = 1.5(2πrh)
    = 1.5 times.

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