# The hall

The hall had a rectangular ground plan one dimension 20 m longer than the other. After rebuilding the length of the hall declined by 5 m and the width has increased by 10 m. Floor area increased by 300 m

^{2}. What were the original dimensions of the hall?**Result****Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):**

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