Two small circular orifices of diameters $d_{1}$ and $d_{2}$ respectively are placed on one side of a tank at depths of 25 cm and 1 m below a constant surface of water. If the discharges through the orifices are the same, then the ratio of the diameter $d_{1}$ and $d_{2}$ will be

- 1
  
  1:2
- 2
  
  $1 : \sqrt{2}$
- 3
  
  4:1
- 4
  
  $\sqrt{2} : 1$

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