Equilateral 73374

The axial section of the cone is an equilateral triangle with a side of 12 cm. Surface and volume calculation.

Correct answer:

V =  391.7807 cm3
S =  339.292 cm2

Step-by-step explanation:

a=12 cm  r=a/2=12/2=6 cm h=3​/2⋅ a=3​/2⋅ 12=6 3​ cm≐10.3923 cm  V=31​⋅ π⋅ r2⋅ h=31​⋅ 3.1416⋅ 62⋅ 10.3923=391.7807 cm3
s=a=12 cm  S=π⋅ r2+π⋅ r⋅ s=3.1416⋅ 62+3.1416⋅ 6⋅ 12=339.292 cm2

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