Engineering Mechanics - Center of Gravity and Centroid - Discussion

Discussion :: Center of Gravity and Centroid - General Questions (Q.No.4)


Determine the volume of concrete needed to construct the circular curb.

[A]. V = 1.083 m3
[B]. V = 1.309 m3
[C]. V = 1.756 m3
[D]. V = 8.67 m3

Answer: Option A


No answer description available for this question.

Vanessa said: (Jan 24, 2015)  
Could anyone please explain how to properly approach this problem using the Pappus-Guldinas theorem.

Jack said: (Dec 28, 2015)  
I didn't use the Pappus-Guldinas theorem but I solved this question by using basic mathematical formulas.

Firstly, I found the interior side which sees the angle is 45 degree from (45*(2*pi*(18+0.4m))/360. Then with the same way I found the exterior side. And the I calculated the volume of the bottom part.

Finally, I calculated the volume of the upper part and addition of two volume and I got 1.073 m^3. I chose the nearest option C.

John said: (Jan 18, 2016)  
I solved using Pappus theorem. I got 1.079, I choose A.

Susheel said: (Feb 29, 2016)  
Tell me the Pappus theorem.

Katharnak said: (Jul 12, 2017)  
I think Sambar approach is better than Pappus.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.