Multiple choice

If the radius of 2 cylinders are in the ratio 3: 4 and their heights are in the ratio 4: 9, then the ratio of their volumes is:

  1. $2: 1$
  2. $1: 4$
  3. $1: 2$
  4. $4: 1$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volume of cylinder = πr²h. Ratio of volumes = π(3r)²(4h) : π(4r)²(9h) = 36πr²h : 144πr²h = 36 : 144 = 1 : 4.

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