1(b) A cutting is to be made through rough ground. The width of the bottom has to be a constant 4m and the sides of the cutting must be at a slope of 1 in 1. The depth s of the cutting at 6 m intervals are :-

(a) 1.8m (b) 1.4m (c) 1.4m (d) 1.8m (e) 2.0m (f) 2.6m

(g) 3.2m (h) 3.6m (i) 2.8m (j) 2.6m (k) 2.4m (l) 2.8m

(m) 3.8m

(ii) Determine the cross sectional area for each cross section.