Gravel - cone

The mound of gravel has a regular circular cone shape with a height of 3.3 meters and a base circumference of 18.85 meters. How many cubic meters of gravel are in a pile? Calculate the weight of gravel if its density is p = 640 kg/cubic m.

Correct answer:

V =  31.1032 m3
m =  19906.069 kg

Step-by-step explanation:

h=3.3 o=18.85 r=o/2/π=18.85/2/3.14163.0001 S=π r2=3.1416 3.0001228.2757 V=S h/3=28.2757 3.3/3=31.1032 m3
q=640 m=q V=640 31.1032=19906.069 kg

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