Calculate the volume of earth work for an embankment of length L and width B. The mean depth of the embankment is D and side slope is S : 1.Using mid-sectional area method.

A

$$ B \times D \times L $$

B

$$ ( B + B + sD ) \times D \times L $$

C

$$ ( B + B + sD ) \times D \times L / 2 $$

D

$$ ( BD + sD^2) \times L $$