A steel plate is 300 mm wide and 10 mm thick. A rivet of nominal diameter 18 mm is driven. The net sectional area of the plate is

- 1
  
  $1800 m m^{2}$
- 2
  
  $2805 m m^{2}$
- 3
  
  $2820 m m^{2}$
- 4
  
  $3242 m m^{2}$

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