Answer
45cm
Work Step by Step
$a^{2}$ +$b^{2}$ =$c^{2}$ Let a=36 km and b=27km
$36^{2}$ +$27^{2}$ =$c^{2}$
1296+729 =$c^{2}$
2025 =$c^{2}$
c=45
The hypotenuse is 45cm
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