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The perimeter of a rectangle is 36 cm. Length is 4 cm more than breadth. The breadth is
A5 cm
B7 cm
C9 cm
D11 cm
Answer & Solution
Correct answer: B. 7 cm
1. Let breadth = b cm; length = b + 4 cm.
2. Perimeter: 2(b + b + 4) = 36, so 4 b + 8 = 36.
3. 4 b = 28, b = 7 cm.
4. Breadth is 7 cm.
_Source: Selina Concise Mathematics Class 8, Ch 18 Linear Equations in One Variable (Mistral OCR'd PDF), section on perimeter problems_
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