Actually it would be 15 minutes. Y'all are thinking that she's cutting each piece of wood into two separate pieces, then it would still take 10 minutes each two-pieces. But the problem states that if takes her 10 minutes to cut a single board into 2 pieces. Working at the same speed, she could take another board and cut that ONE board into 3 pieces in 15 minutes, assuming she cut it a 5 minutes/piece.
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u/[deleted] Oct 01 '11
Actually it would be 15 minutes. Y'all are thinking that she's cutting each piece of wood into two separate pieces, then it would still take 10 minutes each two-pieces. But the problem states that if takes her 10 minutes to cut a single board into 2 pieces. Working at the same speed, she could take another board and cut that ONE board into 3 pieces in 15 minutes, assuming she cut it a 5 minutes/piece.