Question 120

A man completes a journey in 7 hours. He travels first half of the journey at the rate of 20 kmph and second half at the rate of 30 kmph. Find the total distance of the entire journey. (in km)

Solution

Let total distance = $$2d$$ km

Using, time = distance/speed

=> $$\frac{d}{20}+\frac{d}{30}=7$$

=> $$\frac{30d+20d}{600}=7$$

=> $$5d=7\times60$$

=> $$d=7\times12=84$$

$$\therefore$$ Total distance of the entire journey = $$2\times84=168$$ km

=> Ans - (C)


Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free

cracku

Boost your Prep!

Download App