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942 cm³.

Step-by-step explanation:

To find the volume of the cone, we will need to use the formula: bh.

To find the base, we simply need to find the area of the circle. This is done by using: ².

From this, we get a base area of ≈314 cm².

Now, to find the volume of the cone, we, multiply by the height giving us:

314×9= 2826.

Finally, the last step is to multiply this by , resulting in:

2826×= 942.

Therefore,  942 cm³ is the correct answer.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!