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Units in a 13 by 9 rectangle:\nHow many square units are contained in a rectangle of side lengths 13 units and 9 units?

Difficulty: Easy

Correct Answer: 117

Explanation:


Introduction / Context:
The area of a rectangle equals length times breadth. With integer sides, the product gives the number of square unit tiles that fit exactly.


Given Data / Assumptions:

  • Length = 13 units.
  • Breadth = 9 units.


Concept / Approach:
Area A = L * B. Multiply directly since both are in the same unit.


Step-by-Step Solution:

A = 13 * 9 = 117 square units.


Verification / Alternative check:

A quick grid visualization: 13 columns × 9 rows has 117 cells; consistent.


Why Other Options Are Wrong:

13 and 9 are side lengths, not areas; 13/9 is irrelevant to area computation.


Common Pitfalls:

Confusing perimeter with area; perimeter would be 2(13 + 9) = 44, not listed here.


Final Answer:

117
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