Calculate 30991

The volume of the cone is 461.58 cm3. Its diameter is 14 cm. Calculate the surface area of ​​this cone.

Correct answer:

S =  404.5965 cm2

Step-by-step explanation:

V=461.58 cm3 D=14 cm  r=D/2=14/2=7 cm S1=π r2=3.1416 72153.938 cm2  V = 31 S1 h  h=S13 V=153.9383 461.588.9954 cm  s2 = h2+r2 s=h2+r2=8.99542+7211.3982 cm  S2=π r s=3.1416 7 11.3982250.6585 cm2  S=S1+S2=153.938+250.6585=404.5965 cm2

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