Difficulty: Easy
Correct Answer: 240 sq m
Explanation:
Introduction / Context:
Rectangles with a given side ratio and an additive difference can be solved with a single variable. Convert the ratio to algebra, use the difference to find the scale, then compute area as length times breadth in square metres.
Given Data / Assumptions:
Concept / Approach:
Let L = 5k and B = 3k. Then L − B = 2k = 8 ⇒ k = 4. Substitute back to get actual dimensions and multiply to obtain area. This linear system avoids guesswork and ensures consistency.
Step-by-Step Solution:
Verification / Alternative check:
Why Other Options Are Wrong:
Common Pitfalls:
Final Answer:
240 sq m.
Discussion & Comments