The ground surface slopes 1 in 50 along a proposed railway embankment 150 m m length The height of the embankment at zeroi chainage is 0.5 m,the width is 11 m and side slopes 2:1. If the falling gradient of the embankment is 1 in 150, the quantity of the earth work calculated by prismoidal formula,is

- 1
  
  3250 $m^{3}$
- 2
  
  3225 $m^{3}$
- 3
  
  3275 $m^{3}$
- 4
  
  3300 $m^{3}$

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