If pipe A can fill a cistern in X hours, pipe B can fill the same cistern in Y hours, and pipe C can empty the full cistern in Z hours, then find the time taken to completely fill the cistern, if Pipes A, B and C are opened together.
\(\frac{XYZ}{YZ+XZ-XY}\)
\(\frac{XYZ}{YZ+XZ+XY}\)
\(\frac{XYZ}{YZ-XZ-XY}\)
\(\frac{XYZ}{YZ-XZ+XY}\)
Study the given bar-graph and answer the question that follows. The bar-graph depicts the number of tickets booked for Delhi and Mumbai by Airlines P, Q and R.
The total number of tickets booked for Mumbai by Airlines Q and R was what per cent more than the number of tickets booked for Delhi by Airline R?