[tex]\bf \cfrac{miniature~model}{actual}\qquad 1:25\qquad \cfrac{1}{25}\\\\
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\cfrac{miniature~model}{actual}\qquad \cfrac{1}{x}=\cfrac{1}{25}\implies \cfrac{1\cdot 25}{1}=x\implies 25=\stackrel{building}{x}~ft[/tex]
[tex]\bf \cfrac{miniature~model}{actual}\qquad \cfrac{5}{x}=\cfrac{1}{25}\implies \cfrac{5\cdot 25}{1}=x\implies 125=\stackrel{windmill}{x}~ft
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\cfrac{miniature~model}{actual}\qquad \cfrac{8}{x}=\cfrac{1}{25}\implies \cfrac{8\cdot 25}{1}=x\implies 200=\stackrel{street}{x}~m
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\cfrac{miniature~model}{actual}\qquad \cfrac{x}{75}=\cfrac{1}{25}\implies x=\cfrac{75\cdot 1}{25}\implies \stackrel{ship}{x}=3~m[/tex]
