Answer:
1. Maria bought chocolate, not candles.
2. 3 and 7
3.The length is 6 the width is 5, the area will be 30 m², therefore, the width is 7 meters less than twice the length, the length is 6, so twice 6 is 12, the width is 5, therefore the width is 7 less than twice the length, so the w is 5 and the length is 6.