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If x : y=3:1,\ t h e n\ x^3-y^3: x^3+y^3...

If `x : y=3:1,\ t h e n\ x^3-y^3: x^3+y^3=?` `10 : 11` b. `11 : 10` c. `13 : 14` d. `14 : 13`

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