Hello!
To find our scale factor, let's divide our real length (1,500) by our scale length (7.5)
1,500/7.5=200
Now, we divide our tennis court dimensions by 200.
120/200=0.6
60/200=0.3
Therefore, our answers are below.
Length: 0.6 feet
Width: 0.3 feet
I hope this helps!