In the method of trenching, the size of the trench may be:
(a) 12 x 5 x 2m
(b) 15 x 5 x 3m
(c) 12 x 3 x 2m
(d) 15 x 5 x 5m
I had been asked this question in quiz.
My doubt stems from Environmental Engineering topic in division Other Major Topics in Civil Engineering of Basic Civil Engineering