Units in a 13 by 9 rectangle: How many square units are contained in a rectangle of side lengths 13 units and 9 units?
Aptitude
Area
Difficulty: Easy
Choose an option
-
A13
-
B9
-
C117
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D13/9
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ENone of these
Answer
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