Allied & ICAR Exam Bank • ALLIED_1482 MCQ • 1 Mark

Section 8: General Aptitude

Analytical & Spatial Aptitude

Subtopic: Spatial Reasoning & 3D Representations

Question Statement:

When the curved lateral surface of a right circular cylinder of radius R and height H is unrolled flat onto a plane, what geometric shape is formed?

Options:

  • (A) A rectangle of dimensions 2*pi*R by H
  • (B) A circular sector of radius H
  • (C) A triangle of base 2*pi*R and height H
  • (D) A rhombus

Answer Key:

A

Step-by-Step Solution & Explanation

The circumference unrolls into a straight segment of length 2*pi*R while the height remains H, forming a rectangle of 2*pi*R x H.
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