Answer: They need to use 1,638 square meters of flooring.
Step-by-step explanation:
Hi, to answer this question we have to analyze the information given, and apply the next formula:
Area of a rectangle: length x width
Replacing with the values given and solving for the area (A):
A = 42 x 39 = 1,638 m2
They need to use 1,638 square meters of flooring.
Feel free to ask for more if needed or if you did not understand something.