Question
Fanny took 5 hours 15 minutes to complete her Chinese homework. David took 40 minutes less to complete the homework. How long did David take to complete the homework? Express the answer in h and min.
2 m

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Fanny took 5 hours 15 minutes to complete her Chinese homework. David took 40 minutes less to complete the homework. How long did David take to complete the homework? Express the answer in h and min.