Calculation of Angularity Number

Problem: Calculate the angularity number for aggregate sample from the following data: Relative density of aggregate 2.8, mass of water required to fill the cylinder 2500 gm, mass of cylinder filled with compacted aggregate 5150 gm and mass of cylinder 1100 gm?
Exam Name: PGCB 2015

Solution: 
We know that,
               Angularity number = 67 -{ (100 W)/CGs}
     Here, W= (5150 - 1100) g
                  = 4050 g
               C = 2500 gm
               Gs= 2.8

   ∴ Angularity number = 67 - {(100* 4050 )/ (2.8* 2500)}
                                      = 9.14

Answer: 9.14  
            

---