Volume of cylinder from curved surface area and height: A cylinder has height 14 cm and curved surface area 264 cm2. Find its volume (in cm3). Use π = 22/7.

Difficulty: Medium

Correct Answer: 396 cm3

Explanation:


Introduction / Context:
From curved surface area (CSA) we can find the radius, and then compute the cylinder’s volume. This checks correct use of CSA and volume formulas with π = 22/7.


Given Data / Assumptions:

  • Height h = 14 cm
  • CSA = 264 cm2
  • CSA = 2π r h; Volume V = π r^2 h
  • π = 22/7


Concept / Approach:

  • Find r from r = CSA / (2πh); then compute V.


Step-by-Step Solution:

r = 264 / (2 * (22/7) * 14) = 264 / (88) = 3 cm.V = (22/7) * 3^2 * 14 = (22/7) * 9 * 14 = 22 * 18 = 396 cm3.


Verification / Alternative check:

Check CSA with r=3: 2*(22/7)*3*14 = 264 (consistent).


Why Other Options Are Wrong:

  • 308/1232/1448 cm3: Result from wrong r or using total surface area mistakenly.


Common Pitfalls:

  • Using total surface area formula instead of CSA.
  • Not simplifying the fraction with π = 22/7 cleanly.


Final Answer:

396 cm3

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