A cylindrical steel part with a bottom radius of 3cm and a length of 2cm is cast into a conical part with a bottom area of 31.4cm2. What is the height of the conical part?

3.14 × 32 × 2 × 3 △ 31.4, = 3.14 × 9 × 2 × 3 △ 31.4, = 5.4 (CM); answer: the height of this conical part is 5.4 cm

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