Question
Amadeus and Bernard builds a toy car in 3 hours.
Bernard and Chris builds a toy car in 2 hours.
Chris and Amadeus builds a toy car in 8 hours.
How long does it take for Amadeus, Bernard and Chris to build a toy car together?
3 m

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Amadeus and Bernard builds a toy car in 3 hours.
Bernard and Chris builds a toy car in 2 hours.
Chris and Amadeus builds a toy car in 8 hours.
How long does it take for Amadeus, Bernard and Chris to build a toy car together?