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Time taken by pipe C to empty the full pool = 30 × 2 = 60 minutes Let the capacity of pool = 60 units Number of units of water filled by pipe A alone in one minute = 60/30 = 2 units Number of units of water filled by pipe B alone in one minute = 60/20 = 3 units Number of units of water emptied by pipe C alone in one minute = 60/60 = 1 units Required time taken = 60/(2 + 3 – 1) = 15 minutes
Absolute alcohol is prepared from rectified spirit by using the following process :
Which one of the following is commonly used for pulp bleaching in the paper industry?
Ethane gas has a slightly _____ taste.
Which of the following is true about isotopes?
Which of the following is an example of a heterogeneous mixture?
Compressed natural gas (CNG) primarily consists of which gas?
Which type of glass is used for making chemical apparatus like beakers, flasks etc.?
Newton's first law of motion gives the concept of –
Which of the following substances will turn red litmus paper blue?
White phosphorus is stored in which of the following substances?