Question
Aden and Brent builds a toy car in 3 hours.
Brent and Clark builds a toy car in 4 hours.
Clark and Aden builds a toy car in 2 hours.
How long does it take for Aden, Brent and Clark to build a toy car together?
3 m

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Aden and Brent builds a toy car in 3 hours.
Brent and Clark builds a toy car in 4 hours.
Clark and Aden builds a toy car in 2 hours.
How long does it take for Aden, Brent and Clark to build a toy car together?