2、3÷2 = 1.5(m) 1.5× 1.5×π× 1.2× 1/3 = 2.826(m？ )6cm=0.06m 0.06×8=0.48(m？ )

2.826 ÷ 0.48 = 5.8875m.

3、4×4×π=50.24(m？ ) 150.72÷50.24=3 (m) 3×3=9 (cm)

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