The approximate depth of a vertical open excavation without bracing and spalling in dense sands is -
(a) 0
(b) 0.5 m
(c) 1 m
(d) 1.5 m.
The correct Answer Is
(a) 0
				
			(a) 0
(b) 0.5 m
(c) 1 m
(d) 1.5 m.
The correct Answer Is
(a) 0
 
	 
 
		
 
 
		 
 
		 
 
		