9 वर्कर्स टुक 16 डेज टो कंपलीट पक्का बाउंड्री वॉल ऑफ स्कूल इस नंबर ऑफ वर्कर्स विल बी 2 thenइन हाउ मेनी डेज विल बी कैन बे प्रिपेयर्ड
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if they were two then they took 26 days to complete the work and 9 people took 29 days to complete the work
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