Question
Mr Chia's car was left with 15 fuel. He added 40 ℓ of fuel to his car, it became 1315 full. How much more fuel was needed to fill up Mr Chia's car?
4 m

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Mr Chia's car was left with 15 fuel. He added 40 ℓ of fuel to his car, it became 1315 full. How much more fuel was needed to fill up Mr Chia's car?