Question
Pipe ‘A’ takes 15 minutes to fill a tank.
Pipe ‘B’ takes 20 minutes to empty the same tank. If pipe ‘B’ is opened 12 minutes after pipe ‘A’, then find the total time taken to fill the tank in this manner.Solution
Let the capacity of the tank be ‘60’ litres {LCM (15, 20)} Efficiency of pipe ‘A’ = (60/15) = 4 litres/minute Efficiency of pipe ‘B’ = (60/20) = 3 litres/minute Quantity of water filled by pipe ‘A’ in 12 minutes = 12 × 4 = 48 litres Quantity of water to be filled = 60 – 48 = 12 litres Time taken by pipe ‘A’ and ‘B’ together to fill 12 litres of water = {12/(4 – 3)} = 12 minutes Total time taken = 12 + 12 = 24 minutes
Repetition of sound produced by reflection of sound waves is called-
Which of the following statement is CORRECT?
Sodium Chloride is an example of
How many electrons are involved in the oxidation by KMnO4 in basic medium
Which material is commonly used for making casts and sculptures?
Identify the Correct Descriptions for the Following Thermodynamic Processes:
   (I) Isobaric Process The process which takes place at cons...
What type of equilibrium is it when the center of gravity is at the highest point?
Which of the following statements about glucose is incorrect?
What is the colour of base?
Which of the following rock is not sedimentary rock?
Relevant for Exams:
