**61) What is the value of bulk unit weight if the soil’s moisture content is 20% & the dry unit weight of soil is 17 KN/m3.**

a) 22.6 KN/ m3

b) 24.4 KN/ m3

c) 19.3 KN/ m3

d) 20.4 KN/ m3

Komal Bhandakkar Answered question January 5, 2021

**Answer: d) 20.4 kN/ m3**

Explanation:

Given Data:

- Dry unit weight of soil, γd = 17 KN/ m3
- Moisture content of soil, w = 20% = 20/100 = 0.2

Solution:

- We know that,

Dry unit weight of soil = (Bulk Unit weigth of soil)/(1+Moisture Content)- Symbolically, γd = γ/(1+w)
- After rearranging of above terms,
- we get, Bulk unit weight, γ = γd x (1+w)

γ = 17 x (1+0.2)

γ = 20.4 KN/ m3.

Komal Bhandakkar Edited answer January 5, 2021