What formula do you use?

The hole is a cone and it's asking for the surface so am guessing the top of the hole and so for that it would be a circle. And a surface is also the area of something. so:

To find the area of a circle with the radius, square the radius, or multiply it by itself. Then, multiply the squared radius by pi, or 3.14, to get the area. Or A=πr^2

To find the area with the diameter, simply divide the diameter by 2, plug it into the radius formula, and solve as before.

Hope this helps

42.4

step-by-step explanation:

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