Tap Q and R start to empty the full tank at 10 00 PM At what time tank will be empty ........

Quantitative Aptitude ( CCS) Pipes&cistern

Directions (): Study the pie chart carefully and answer the following questions.

Tap Q and R start to empty the full tank at 10:00 PM. At what time, tank will be empty?

11:50 PM

12:00 AM

12:00 PM

11:30 PM

11:45 PM

For the flow rate of Q and R,

Amount of water empty by tap Q = Amount of water empty by tap R = 25% of 400 = 100

Flow rate of Q = flow rate of R = 100/60 = 5/3 l/m

Combine flow rate = 5/3 + 5/3 = 10/3 l/m

For the time taken to empty the tank,

Time taken to empty 400 l = 400 × 3/10 = 120 min. = 2 hour

∴ Time when tank empty = 10:00 + 2:00 = 12:00 AM

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