Question
Abraham and Bradley builds a toy car in 3 hours.
Bradley and Cyrus builds a toy car in 8 hours.
Cyrus and Abraham builds a toy car in 4 hours.
How long does it take for Abraham, Bradley and Cyrus to build a toy car together?
3 m

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Abraham and Bradley builds a toy car in 3 hours.
Bradley and Cyrus builds a toy car in 8 hours.
Cyrus and Abraham builds a toy car in 4 hours.
How long does it take for Abraham, Bradley and Cyrus to build a toy car together?