Weight of an oven dry sand and air dry sand are 500 gm and 520 gm respectively. If the wieght of the same sand under saturated but surface dry condition of 525 gms, then the water absorption of sand is

- 1
  
  1%
- 2
  
  4%
- 3
  
  4.76%
- 4
  
  5%

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