A cement concrete road is 1000 m long,8m wide and 15 cm thick over the sub-base of 10 cm thick gravel, The cubic content of concrete (1:2:4) for the road specified

- 1
  
  300 $m^{3}$
- 2
  
  600 $m^{3}$
- 3
  
  900 $m^{3}$
- 4
  
  1200 $m^{3}$

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