A=45
A=kx/y
where k is constant
substituting the values for k
k= 20×9/6=30
when x=9, y=6
A= 30×9/6=45
Answer:
<C
Step-by-step explanation:
24 feet
Set up a ratio which is 15/x=40/64 and cross multiply to get 960=40x and divide to get 24