Answer
Please see the work below.
Work Step by Step
We know that
$A=350ft^2=(350)(0.3048m)^2=32.516m^2$
$V=1 \space gallon=3.785L$
Now we can find the coverage
$coverage=\frac{32.516m^2}{3.785}=8.59\frac{m^2}{L}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.