Question
Pipe A and Pipe B could fill a tank together in 18
hours and 12 hours respectively, while pipe C could empty it in 9 hours. If both inlet pipes are opened together for first 5 hours, then pipe C replaced them. Find the time taken by pipe C to empty the tank filled by pipe A and pipe B together.Solution
Let the capacity of the tank be 36 units. (LCM of 18, 12 and 9)
Efficiency of pipe A = 36/18 = 2 units/hr
Efficiency of pipe B = 36/12 = 3 units/hr
Efficiency of pipe C = 36/9 = –4 units/hr ATQ,
Tank filled by pipe A and B together in 5 hours = (2 + 3) × 5 = 25 units
Required time = 25/4 = 6 (1/4) hr = 6 hr 15 min
Which financial firm has partnered with Indian Railways Catering and Tourism Corporation (IRCTC), to provide a Travel Now Pay Later (TNPL) payment optio...
Who has been appointed Vice President for the East Asia and Pacific Region of the World Bank Group in September 2025?
According to the information provided by the Ministry of Fisheries, Animal Husbandry & Dairying, from a mere 7.5 lakh tons in 1950-51, India’s total f...
Who among the following person receives the Satyajit Ray Lifetime Achievement award at 53rd IFFI?
Which geological site in Maharashtra has been added to UNESCO’s Tentative List in 2025?
Which animal safari was launched at Bannerghatta Biological Park, covering 20 hectares?
What is the total investment made under fisheries schemes like PMMSY, as reported in 2025?
The Indian Institute of Technology Madras became the first Indian Institute of Technology to set up an international campus, by launching a campus in Ta...
What is the name of the AI-based Indian language LLM initiative showcased at the ITU FG-AINN meeting in New Delhi?
Which country leads the world in plastic pollution, according to a recent study?
