It takes Wiliam 5 minutes to finish a Math exercise . After finishing an exercise, he needs 1 minute to relaxx . He starts doing exercise at 8:00 . When does he finish the 9th exercise ?
It takes Wiliam 5 minutes to finish a Math exercise . After finishing an exercise, he needs 1 minute to relaxx . He starts doing exercise at 8:00 . When does he finish the 9th exercise ?
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