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प्रश्न
The perimeter of a circle and its diameter vary ______ with each other.
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उत्तर
The perimeter of a circle and its diameter vary directly with each other.
Explanation:
Perimeter of a circle = 2πr
Diameter of a circle = 2 × r
⇒ Perimeter = π × Diameter ...[∵ π = constant]
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