Question
A cistern has a leak that can empty it in 12 hours. A
tap is turned on, which fills water at the rate of 15 liters per hour. Now, the cistern gets emptied in 20 hours. What is the capacity of the cistern?Solution
Let the capacity of the cistern be x liters. Leak empties x liters in 12 hours: Rate = x/12 liters/hour Tap fills at 15 liters/hour. Net rate = (x/12 - 15) liters/hour Time to empty = x / (x/12 - 15) = 20 hours 1 / (1/12 - 15/x) = 20 1/12 - 15/x = 1/20 Solve: x = 450 liters Correct answer: c) 450 liters
The ‘Pulitzer Prize’ is associated with:
Banj (Oaks) and Chestnuts are the predominant species of which of the following vegetation zones?
Central government launch Swachh Vayu Sarvekshan as part of National Clean Air Programme (NCAP), It may help to reduce air pollution up to 40 per cent b...
Which Russian Cosmonaut holds the record for the longest spaceflight overall?
Kodava Hockey Festival is held in ________.
Based on the Tendulkar committee, the National poverty line was defined as which of the following?
i. ₹816 per capita per month for rural areas...
Ethanoic acid is a synonym for which acidic liquid is used in kitchens around the world as a basic seasoning in the preparation and cooking of certain f...
Prime Minister Narendra Modi was honoured with which award in 2019 by Bill and Melinda Gates Foundation for this leadership and commitment to improve ...
In the 4th edition of the Ranking of States on Support to Startup Ecosystems, which state was recognized as the "Best Performer" in Category B (States a...
In which Five-Year Plan were Removal of Poverty (Garibi Hatao) and Self-Reliance declared as major plan objectives?Â
