Question
Gwen had 1780 mℓ more tea than Hilda. After Gwen gave Hilda 450 mℓ of tea, the ratio of Gwen's tea to Hilda's tea became 7 : 3. How much tea did Gwen have at first? Give your answer in millilitres.
4 m

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Gwen had 1780 mℓ more tea than Hilda. After Gwen gave Hilda 450 mℓ of tea, the ratio of Gwen's tea to Hilda's tea became 7 : 3. How much tea did Gwen have at first? Give your answer in millilitres.