Question
Abdul and Benjamin builds a toy car in 2 hours.
Benjamin and Colin builds a toy car in 4 hours.
Colin and Abdul builds a toy car in 5 hours.
How long does it take for Abdul, Benjamin and Colin to build a toy car together?
3 m

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Abdul and Benjamin builds a toy car in 2 hours.
Benjamin and Colin builds a toy car in 4 hours.
Colin and Abdul builds a toy car in 5 hours.
How long does it take for Abdul, Benjamin and Colin to build a toy car together?