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Total work = 36 × 45 = 1620 units Work completed by 18 painters in 30 days = 18 × 30 = 540 units Remaining work = 1620 – 540 = 1080 units Let the number of painters added be ‘v’. Therefore, (18 + v) × 15 = 1080 270 + 15v = 1080 15v = 810 v = 54 Number of painters added = 54
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