Question
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20
minutes and 18 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’ = 180/20 = 9 units/minute Efficiency of pipe ‘B’ = 180/18 = 10 units/minute Efficiency of pipe ‘C’ = 180/12 = 15 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 9 + 10 – 15 = 4 units/minute 50% of the cistern’s capacity = 90 units Therefore, time taken by all 3 pipes together to fill 50% of the cistern = 90/4 = 22.5 minutes
What was India’s rank in ‘GLOBAL MILITARY EXPENDITURE’ in year 2022-23?
The cyclone Trami did devastation in which of the following countries?
Which of the following is NOT a writ issued by the Supreme Court of India?
Which animal is represented by the mascot "Moga" for the 37th edition of the Indian National Games 2023?
Which country has recently launched its first nuclear attack submarine?
Consider the following statements about (Braided River Aid: Hydro-Morphological Analyzer) (BRAHMA-2D):
1. Researchers at the IIT Delh...
Which country has recently been selected to chair the 68th Session of the UN Commission on Narcotic Drugs (CND)?
The demand curve shows that:
In which country will Joint Military Exercise Bright Star-23 be organized?
Which major national steel manufacturer in India is set to launch the state's premier floating solar project?
Relevant for Exams:
