Answer: There are 51.85 feet of 2 × 10 lumber will be needed.
Step-by-step explanation:
Since we have given that
Length of new garage = 324 feet
Length of new rec room = 430 feet
Length of upstairs bonus room = 283 feet
So, Total length would be
Area of lumber = 2 × 10 = 20
so, Number of feet of 2 × 10 lumber would be
Hence, there are 51.85 feet of 2 × 10 lumber will be needed.