A rectangle has a perimeter of 30 cm. The length of the rectangle is twice its breadth. Find the AREA of the rectangle.
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Worked Solution
Step 1: Let breadth = b cm, then length = 2b cm.
Step 2: Perimeter = 2 × (length + breadth) = 2 × (2b + b) = 2 × 3b = 6b.
Step 3: 6b = 30, so b = 5 cm. Then length = 2 × 5 = 10 cm.
Step 4: Area = length × breadth = 10 × 5 = 50 cm².
Answer: 50 cm²
Correct answer: 50 cm²
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