The funnel

The funnel has the shape of an equilateral cone. Calculate the area wetted with water if you pour 3 liters of water into the funnel.

Correct answer:

S =  8.7876 dm2

Step-by-step explanation:

V=3 l dm3=3 1  dm3=3 dm3 2r=s s2 = h2+r2 4r2 = h2+r2 3r2 = h2  h = 3   r  V = 31 π r 2 h V = 31 π r 2 3   r V = 33 π r 3  r=33 π3 V=33 3.14163 31.1826 dm h=3 r=3 1.18262.0484 dm s=2 r=2 1.18262.3652 dm  S=π r s=3.1416 1.1826 2.3652=8.7876 dm2



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