Calculate 5789

Calculate the volume and surface of the rotating cone with the base radius r = 4.6dm and the height v = 230mm.

Correct answer:

V =  50.965 dm3
S =  140.7986 dm2

Step-by-step explanation:

r=4.6 dm v=230/100=1023=2.3 dm S1=π r2=3.1416 4.6266.4761 dm2 V=S1 v/3=66.4761 2.3/3=50.965 dm3
s=r2+v2=4.62+2.325.143 dm S2=π r s=3.1416 4.6 5.14374.3225 dm2 S=S1+S2=66.4761+74.3225=140.7986 dm2

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