IBPS PO RRB PO Prelims 6 Aug 2023 Shift 1 Paper

Two pipes with a leakage are filling a tank. The pipes and the leakage can fill the tank in 18 hrs. But after 3 hrs of working the leakage was observed and repaired. The pipes again started filling the tank and they filled the remaining part in 10 hrs. Find the time taken by the leakage to empty the fully filled tank.