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A cylindrical iron block, with a bottom area of 12.56 square centimeters and a height of 5 centimeters, is cast into a cone part with a bottom area of 31.4 square centimeters What is the height of the part in centimeters
Cone height
=Cylinder volume × 3 △ cone bottom area
=（12.56×5）×3÷31.4
=6 cm
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