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A conical mold, the ground circumference is 12.57cm, and the height is 2.4cm. What is the volume of this mold?
Are you sure it is 12.57? 12.56 is relatively easy to calculate.

Are you wrong?

Base diameter = 1.256÷3. 14=4cm.

Radius = 2 cm

Then the bottom area = 2 * 2 * 3.14 =12.56cm2.

Cone volume = bottom area * height ÷3= 12.56*2.4÷3=7.536 cubic centimeters.

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