On a map $4\text{cm}$ represents $50\text{km}$. The distance between town A and town B is $14\text{cm}$. A car leaves town A and travels towards town B at $35$km per hour. How long does it take the car to travel to town B? 
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If $$4\textasciitilde\text{cm}$$ represents $$50\textasciitilde\text{km}$$, $$2\textasciitilde\text{cm}$$ represents $$25\textasciitilde\text{km}$$. So, their actual distance apart is $$14\div2\times 25=175\textasciitilde\text{km}$$. $175\div35=5$ hours. 