Question
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 15
minutes and 36 minutes respectively. Pipe ‘C’ alone can empty the cistern in 12 minutes. If all three pipes are opened together then what is the time taken to fill 50% of the cistern?Solution
Let the capacity of the cistern = 180 units Then, efficiency of pipe ‘A’ = 180/15 = 12 units/minute Efficiency of pipe ‘B’ = 180/36 = 5 units/minute Efficiency of pipe ‘C’ = 180/12 = 15 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 12 + 5 – 15 = 2 units/minute 50% of the cistern’s capacity = 90 units Therefore, time taken by all 3 pipes together to fill 50% of the cistern = 90/2 = 45 minutes
An MoU for ‘Riverine based tourism Circuit’ being developed over river Brahmaputra will be signed between Inland Waterways Authority of India (IWAI)...
What ensures uninterrupted connectivity between Kashmir and Ladakh during winters in the Z-Morh tunnel?
Tokyo Electric Power Company plans to invest approximately how much to strengthen safety systems at the Kashiwazaki-Kariwa Nuclear Power Plant?Â
What is the total balance held in Pradhan Mantri Jan Dhan Yojana (PMJDY) accounts as of October 22, 2025?Â
The Pulitzer Prize is awarded by which university?
What percentage of the global population affected by HIV lacks access to treatment, as reported by UNAIDS?
Which phase of the National Maritime Heritage Complex (NMHC) project at Lothal, Gujarat, involves the construction of a Light House Museum?
Goa’s 1930 cyber fraud response system now achieves what accessibility level?Â
What technology was launched at the National Zoological Park in Delhi to improve water quality?
- Which city topped the Knight Frank Global Cities Index Q4 2024 in terms of property price appreciation?
Relevant for Exams:
