Question
Three bottles, N, P and Q, contain a total of 13.5 ℓ of water. Bottle N contains 2.8 ℓ of water more than Bottle P. Bottle P contains 2.2 ℓ of water more than Bottle Q. What is the volume of water in Bottle P?
3 m

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Three bottles, N, P and Q, contain a total of 13.5 ℓ of water. Bottle N contains 2.8 ℓ of water more than Bottle P. Bottle P contains 2.2 ℓ of water more than Bottle Q. What is the volume of water in Bottle P?