SOLUTION:

Question 769579:
Found 2 solutions by satishkumar6325@mail.com, jessica.pitts25:
Answer by satishkumar6325@mail.com(1) (Show Source): You can put this solution on YOUR website!
67895 987544
Answer by jessica.pitts25(1) (Show Source): You can put this solution on YOUR website!
a = 57,000 btu's