Multiple choice

The curved surface area of a cylindrical rod is 264 m2 and its volume is 924 m3. The ratio of its semi diameter to height is -

  1. 7: 6

  2. 7: 3

  3. 6: 7

  4. 3: 7
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For a cylinder with curved surface area (CSA) = 2πrh = 264 and volume = πr²h = 924, dividing volume by CSA gives r/2 = 924/264 = 3.5, so r = 7. Substituting r = 7 in CSA: 2π(7)h = 264, we get h = 6. The ratio of semi-diameter (r) to height is 7:6. Option A correctly states this ratio.

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