Let the capacity of the cistern = 60 units Then, efficiency of pipe ‘A’ = 60/20 = 3 units/minute Efficiency of pipe ‘B’ = 60/15 = 4 units/minute Efficiency of pipe ‘C’ = 60/12 = 5 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 3 + 4 – 5 = 2 units/minute 50% of the cistern’s capacity = 30 units Therefore, time taken by all 3 pipes together to fill 50% of the cistern = 30/2 = 15 minutes
Which Indian state has commenced a census based on caste, following Bihar's lead as the second state to undertake such an initiative?
Which part of the plant allows for the uptake of carbon dioxide and limits the loss of water due to evaporation?
Who among the following wrote the book "India Wins Freedom', giving an insider's view of India's freedom struggle?
The Pradhna Mantri Garib Kalyan Ann Yojana (PMGKAY) was extended for how many months by the Central Government till November 2021 to distribute free w...
Which of the following entities is to perform the functions of the Central KYC Records Registry (CKYCR)?
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The value of [(3√2+2) × (3√2-2)] of 13 + 20 is: