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+5 votes

A tourist covers half of his journey by train at $60$ $km/h$, half of the remainder by bus at $30$ $km/h$ and the rest by cycle at $10$ $km/h$. The average speed of the tourist in $km/h$ during his entire journey is

  1. $36$
  2. $30$
  3. $24$
  4. $18$
asked in Numerical Ability by Veteran (359k points)
edited by | 1.4k views

2 Answers

+11 votes
Best answer
Let the total distance be $D$ then

Avg speed $=\dfrac{D}{\text{total time taken}}$

Total time taken $=\left(\dfrac{D}{2} \times 60\right)+ \left(\dfrac{D}{4}\times 30\right)+ \left(\dfrac{D}{4}\times 10\right)$

$\text{Avg speed}- \dfrac{120}{5}=24.$
answered by Boss (14.3k points)
edited by
+8 votes


answered by Active (2.1k points)

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