Question

Please help me answer question 4 in the photo.

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Answer 1

volume of a right circular cone :
V = πr²(h/3)
given the height, h = 30 and volume, V = 360π

360π = πr²(30/3)

the π cancel out, 30/3 becomes 10

360 = 10r²

divide by 10 on both sides.

36 = r²

take the square root

r = 6 cm