Answer:
[tex]400[/tex]
Step-by-step explanation:
[tex]500^2-300^2=160000\\\sqrt{160000}=400[/tex]
distance between Library and Museum=√(500²-300²)=√[100²(5²-3²)]
=100√(25-9)
=100√16
=100×4
=400 yd
