Answer:
It need 7.5 quarts of varnish
Step-by-step explanation:
varnish [tex]\frac{3}{4} = 10[/tex] doors
So, 6 quarts of varnish and is going to be 20 doors so to 25 doors is going to be 7.5 quarts.
The varnish measure comes in quarts so we don't need to divide each unit by 4
3⇒10
x⇒25
[tex]x= \frac{25*3}{10} = 7.5[/tex]