Question
Aqil and Bradley builds a toy car in 9 hours.
Bradley and Charles builds a toy car in 6 hours.
Charles and Aqil builds a toy car in 4 hours.
How long does it take for Aqil, Bradley and Charles to build a toy car together?
3 m

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Aqil and Bradley builds a toy car in 9 hours.
Bradley and Charles builds a toy car in 6 hours.
Charles and Aqil builds a toy car in 4 hours.
How long does it take for Aqil, Bradley and Charles to build a toy car together?