Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the
same in 40 mins.If all of them work together, find the time taken to fill the tank
1. 17 1/7 mins
2. 20 mins
3. none
4. 50 mins
same in 40 mins.If all of them work together, find the time taken to fill the tank
1. 17 1/7 mins
2. 20 mins
3. none
4. 50 mins
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