3 pums, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

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Job Solution Uttara Bank Ltd উত্তরা ব্যাংক | অ্যাসিস্ট্যান্ট অফিসার | 23-07-2022 গণিত
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