1.

The area of a sloping surface of a protective embankment of mean height d, side slopes S: 1 and length L is __________

A. d x d x s
B. (d<sup>2</sup> x (ds)<sup>2</sup>)<sup>1/2</sup>
C. L.D (1 + s<sup>2</sup>)<sup>1/2</sup>
D. 2 L.D (1 + s<sup>2</sup>)<sup>1/2</sup>
Answer» D. 2 L.D (1 + s<sup>2</sup>)<sup>1/2</sup>


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