Question
Bryan builds a toy car in 7 hours.
Bryan and Adam builds a toy car in 4 hours.
If Adam builds a toy car by himself, how long will he take?
(Give the answer in fraction. Eg 113 h)
3 m

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Bryan builds a toy car in 7 hours.
Bryan and Adam builds a toy car in 4 hours.
If Adam builds a toy car by himself, how long will he take?
(Give the answer in fraction. Eg 113 h)