Area of steel required per metre wideth of pavement for length of 20 m for design wheel load 6300 kg and permissible stress is steel 1400 $k g / c m^{2}$ , is

- 1
  
  70 kn/sq cm
- 2
  
  80 kg/sq cm
- 3
  
  90 kg/sq cm
- 4
  
  100 kg/sq cm

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