Final answer:
The length of 2in by 4in material required to make twelve bench legs each 15 1/8in long is 181.5in.
Step-by-step explanation:
To find the length of 2in by 4in material needed to make twelve bench legs each 15 1/8in long, we need to calculate the total length of the material required.
First, calculate the length of one bench leg:
Length of one bench leg = 15 1/8in = 15 + 1/8in = 15 + 0.125in = 15.125in
Next, calculate the total length of all twelve bench legs:
Total length of all twelve bench legs = Length of one bench leg x Number of bench legs
Total length of all twelve bench legs = 15.125in x 12
Total length of all twelve bench legs = 181.5in