Initial area = π × 5² = 25π km². Final area = π × 8² = 64π km². Increase = 64π − 25π = 39π km². Percentage increase = (39π ÷ 25π) × 100% = (39 ÷ 25) × 100 = 156%.

Sun, 03 May 2026 19:42:07 +0000

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