A right pyramid with a square base has base 12 cm and height 40 cm. It is kept on its base. It is cut into 4 parts of equal heights by 3 cuts parallel to its base. What is the ratio of volume of the four parts?

A right pyramid with a square base has base 12 cm and height 40 cm. It is kept on its base. It is cut into 4 parts of equal heights by 3 cuts parallel to its base. What is the ratio of volume of the four parts?
1). 1 ∶ 8 ∶ 27 ∶ 70
2). 1 ∶ 7 ∶ 19 ∶ 47
3). 1 ∶ 7 ∶ 19 ∶ 37
4). 1 ∶ 8 ∶ 27 ∶ 64

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