দূরত্ব নিয়ে ভাবনা চিন্তা


Points $P$ and $Q$ are $10$ units apart. Points $Q$ and $R$ are $4$ units apart. Points $R$ and $S$ are $3$ units apart. If $P$ and $S$ are as close as possible, find the distance between $P$ and $S$.

Basic   BdMO  


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