A tap can fill a tank in 6 hours. After half the tank is filled three more similar taps are opened . What is the total time taken to fill the tank completely?
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Job Solution Janata Bank Ltd এসিস্ট্যান্ট এক্সিকিউটিভ অফিসার (টেলর) ২০.১২. ২০১৯ গণিত
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