Question 13
Mr Thanh saws a 4 m log into equal pieces 20 cm long. Each cut takes 8 minutes, and he rests for 2 minutes between consecutive cuts. He starts at 7:00 a.m. At what time does he finish?
Model clarification: cuts are made one at a time without stacking pieces; ignore the width of the saw blade. There is no rest before the first cut or after the last cut.
Model clarification: cuts are made one at a time without stacking pieces; ignore the width of the saw blade. There is no rest before the first cut or after the last cut.