<u>Explanation:</u>
% Gravel = 100 - 72% = 28%
% Sand = 100 - 28 - 15 = 57%
% Fires = 100 - 0 - 28 - 57 = 15%

The soil is poorly graded soil.
We are required to state the type of vehicle which is routinely used at the construction site.
The vehicle which is routinely used at the construction site is called hydraulic vehicle.
- Hydraulics as the name implies is pertaining to water. Hydraulic vehicle is a vehicle used on the construction site. The vehicle makes use of liquids to function. The fluid powers the engine of the vehicle do as to generate power.
- Types of fluids used in hydraulic vehicles includes: Water fluid, petroleum fluid, synthetic fluid.
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Answer:
The duration of the consolidation process for the same clay is 32 min
Explanation:
for clay 1:
t1=0
H1=thickness=2 cm
for the clay 2:
t2=?
H2=2 cm
The time factor is equal to:

where Cv is the coefficient of consolidation

if Cv is constant, we have:

Clearing t2:
t2=32 min