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mathematical formula
(1) Let the height of the conical part be x cm.

1/3×3. 14×6×6x = 282.6

37.68x=282.6

x=7.5

Answer: The height of the conical part is 7.5 cm.

(2) let the water rise by x cm, according to the meaning of the question.

32x=4×4×8

32x= 128

x=4

The water level rose by 4 cm.

(3 3) 10/0cm =0. 1 m

Radius of cone bottom: 62.8÷3. 14÷2.

=20÷2

= 10 (m)

The volume of the cone:1/3× 3.14×10×10× 6.

=628 cubic meters

Meters paved: 628÷ 10÷0. 1=628 (meters)