=27÷30× 100%
=90%.
Answer: The correct rate is 90%.
(2)30÷( 1-56)
=30÷ 16
= 180 (m)
Answer: This cloth used to be180m.
(3) According to the meaning of the question, cone volume = cube volume:
3×(5×5×5)÷60
=3× 125÷60
=6.25 (decimeter)
Answer: The height of this cone is 6.25 decimeters.