Problema Solution
It took Marie 10 minutes to saw a board into 2 pieces. If She works just as fast, how long will it take her to saw another board into 3 Pieces?
Answer provided by our tutors
The rate of Maris is 10/2 min per piece = 5 min per piece.
Since she cut 3 pieces the time needed for 3 pieces will be 3*5 = 15 minutes.