The trapezoids at right are similar shapes. 

1. What is the scale factor between shape B and shape A?

   Hint (a):

   What is the ratio between the pair of sides 50 m and 30 m?

2. Find the lengths of the missing sides.

   Hint (b):

   Use this ratio with each other pair of sides with one given length to solve for the variable.

   Partial Answer (b):

   $x=$ 9 m
   
   If $x$ is 9 m, what would $y$ be?