Final answer:
To find the minimum length in a 50 g ball of knitting wool, set up a proportion using the given information. Solve for x to find the length.
Step-by-step explanation:
To find the minimum length you would expect in a 50 g ball of the knitting wool, you can set up a proportion using the given information. Since 10 g of the wool has a length of 20 m, you can set up the proportion: 10 g / 20 m = 50 g / x, where x represents the unknown minimum length.
Now, cross-multiply and solve for x:
10 g * x = 20 m * 50 g
x = (20 m * 50 g) / 10 g = 100 m
Therefore, the minimum length you would expect in a 50 g ball of this wool is 100 m.