Question
Two inlet pipes M and N alone can fill a tank in 10
hours and 12 hours respectively and an outlet pipe P alone can empty the whole tank in 8 hours. First pipe M is opened for 5 hours, then pipe P is opened for 2 hours and rest of the tank is filled by pipe N. In what time will the tank be filled completely?Solution
Total capacity = 120 units (LCM of 10, 12 and 8) Efficiency of pipe M = 120/10 = 12 units/hr Efficiency of pipe N = 120/12 = 10 units/hr Efficiency of pipe P = 120/-8 = -15 units/hr Capacity of tank filled by pipe M in 5 hours = 12 × 5 = 60 units Capacity of tank emptied by pipe P in 2 hours = -15 × 2 = -30 units Capacity of tank left for pipe N = 120 – 60 – (-30) = 90 units Time taken by pipe N to fill the remaining tank = 90/10 = 9 hrs Total time taken = 5 + 2 + 9 = 16 hrs
Which of the following has recently been added to the UNESCO list of intangible cultural heritages of humanity
In case of mutually exclusive projects and when NPV and IRR giving conflicting results, go for the project having higher IRR
When is Indian Organ Donation Day observed to promote awareness about organ donation and commemorate the generosity of donors?
Which instrument is predominantly used in the music of the Bauls?
RBI can issue any amount of notes on the basis of reserves maintained in the form of
Which country is also known as the land of pagodas?
Who was the first Indian bodybuilder to win the Mr.Universe title?
Nahar Wildlife Sanctuary is located in which state of India?
Which Indian city will soon get its first robocop?
Which of the following is not a member of SAARC (South Asian Association for Regional Corporation)?
Relevant for Exams:
