Question
Time taken by ‘A’ to fill a tank, which is 40%
empty, is 20 minutes, while time taken by ‘B’ to fill the same tank, when it is 25% full, is 30 minutes. On a particular day, when the tank is completely empty, both pipes are opened together. Find the time (in minutes) after which ‘A’ must be closed so that the tank gets completely filled in 28 minutes.Solution
Time taken by ‘A’ to fill the empty tank = {20/0.4} = 50 minutes Time taken by ‘B’ to fill the empty tank = {30/0.75} = 40 minutes Let the total capacity of the tank be 200 litres Efficiency of ‘A’ = {200/50} = 4 litres/minute Efficiency of ‘B’ = {200/40} = 5 litres/minute Let the time after which ‘A’ is closed be T minutes. ATQ, (4 + 5)T + 5(28 - T) = 200 9T + 140 - 5T = 200 4T = 60 T = 15
In which of the following year, Govind Ballabh Pant received the Bharat Ratna Award?
The Cabinet Committee on Economic Affairs has given its approval for the Minimum Support Prices (MSPs) for copra for 2024 season. Which of the following...
The Novelist “Madhu Kankariya” received the Bihari Award for 2021 for her novel of 2018______ by the KK Birla Foundation.
The Government of India has added _____ number of new Ramsar Sites as declared by the Union Minister of Environment, Forest and Climate Change, Bhupende...
Bandhan Bank has recently opened its first Currency Chest in which state of India?
Who founded the Swadesh Bandhaw Samiti?
Which bank has launched the “Vigil Aunty” to promote secure banking practices?
Who has been reappointed as the Chief of RAW?
When is ‘National Legal Services Day’ Observed?
What type of organism serves as the primary consumer in a lake ecosystem?
Relevant for Exams:
