Answer:
8
Explanation:
8 Km
Use Pythagorean theorem to find the length of the lake.
Let the length of Swan Lake = x Km
6² + x² = 10²
36 + x² = 100
x² = 100 - 36
x² = 64
x = √64
x = 8 km
Length of Swan Lake = 8 Km
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