A man can reach a certain place in $30$ hours. If he reduces his speed by $\displaystyle \dfrac {1}{15}$th, he goes $10$ km less in that time. Find his speed in km/ hr?
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A man can reach a certain place in $30$ hours. If he reduces his speed by $\displaystyle \dfrac {1}{15}$th, he goes $10$ km less in that time. Find his speed in km/ hr?