Final answer:
Mary can make a total of 9 litres of soup with her 45 kg of vegetables, by dividing the total vegetables by the amount required per litre of soup.
Step-by-step explanation:
Mary has 45 kg of vegetables to make soup, and each litre of soup requires 5 kg of vegetables. To determine how many litres of soup Mary can make, you divide the total weight of the vegetables by the weight needed per litre of soup.
Solution:
Start by setting up the division problem: 45 kg ÷ 5 kg/litre.
Divide the total kg of vegetables by the kg of vegetables per litre: 45 kg / 5 kg/litre = 9 litres.
Therefore, Mary can make a total of 9 litres of soup with 45 kg of vegetables.