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ATQ, Total work = 24 × 15 = 360 units Amount of deliveries completed by 12 men in 12 days = 12 × 12 = 144 units Amount of work to be completed by (12 + d) men = 360 – 144 = 216 units Therefore, (12 + d) × 12 = 216 Or, 12 + d = 18 Or, d = 6
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