SOLUTION:

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Question 769579:
Found 2 solutions by satishkumar6325@mail.com, jessica.pitts25:
Answer by satishkumar6325@mail.com(1) About Me  (Show Source):
You can put this solution on YOUR website!
67895 987544

Answer by jessica.pitts25(1) About Me  (Show Source):
You can put this solution on YOUR website!
a = 57,000 btu's