A man walks at speed $x$ km/h for $3$ hours, covering $18$ km. $x$ is

A man walks at speed $x$ km/h for $3$ hours, covering $18$ km. $x$ is
  1. $6$
  2. $3$
  3. $54$
  4. $15$

Solution

$3x = 18 \Rightarrow x = 6$.

Asked in: NSO

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