Volume of the cone

Calculate the cone's volume if its base area is 78.5 cm2 and the shell area is 219.8 cm2.

Correct answer:

V =  342.0868 cm3

Step-by-step explanation:

S1=78.5 cm2 S2=219.8 cm2  S1 = π r2  r=S1/π=78.5/3.14164.9987 cm  S2 = π r s  s=S2/(π r)=219.8/(3.1416 4.9987)13.9965 cm  s2 = r2+h2  h=s2r2=13.996524.9987213.0734 cm  V=31 S1 h=31 78.5 13.0734=342.0868 cm3

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