Question
Three bottles, D, E and F, contain a total of 10.5 ℓ of water. Bottle D contains 2.1 ℓ of water more than Bottle E. Bottle E contains 2.1 ℓ of water more than Bottle F. What is the volume of water in Bottle E?
3 m

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Three bottles, D, E and F, contain a total of 10.5 ℓ of water. Bottle D contains 2.1 ℓ of water more than Bottle E. Bottle E contains 2.1 ℓ of water more than Bottle F. What is the volume of water in Bottle E?