Question

what is the missing length in the scaled copy? units original scaled copy

Explanation:

Step1: Find the scale - factor

The scale - factor is found by dividing the new width by the original width. The original width is 25 and the new width is 50. So the scale - factor $k=\frac{50}{25}=2$.

Step2: Calculate the missing length

Multiply the original length by the scale - factor. The original length is 40. So the missing length $l = 40\times2=80$.

Answer:

80