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

A. $${\text{d}} \times {\text{d}} \times {\text{s}}$$

B. $$\sqrt {{{\text{d}}^2} \times {\text{d}}{{\text{s}}^2}} $$

C. $${\text{Ld}}\sqrt {1 + {{\text{s}}^2}} $$

D. $$2{\text{Ld}}\sqrt {1 + {{\text{s}}^2}} $$

Answer: Option C