The cross-sectional area of the embankment of canal fully in embankment Fig. is

- 1
  
  1/2 (b1 + b2) h
- 2
  
  (b1 + b2) h + Sb^2
- 3
  
  (b1 + b2) +2 Sh^2
- 4
  
  2[((b1 + b2) (b+ Sh^2)]

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