CAT Practice : Speed Time, Races

Lightning McQueen starts later but still catches up with King and Chick. And you thought CAT prep was boring.

Speed Time - Cars

    1. 60 kmph
    2. 80 kmph
    3. 20 kmph
    4. 40 kmph


  • Correct Answer
    Choice A. 60 kmph

Explanatory Answer

Click to watch video solution
Click to view the explanation as a slide show

Detailed Solution

= 1

v3 = 2v1

Let v1, v2 and v3 be the speeds of the cars.
Condition I states that the cars leave in equal intervals of time and arrive at the same time. Or, the difference in the time taken between cars 1 and 2 should be equal to the time taken between cars 2 and 3.

We get

As the second car arrived at C an hour earlier than the first, we get a second equation = 1

The third car covered 240 + 80 kms when the first one covered 240 – 80 kms. Therefore,

This gives us v3 = 2v1

From condition 1, we have
Substituting v3 = 2v1, this gives us
or v2 =

Solving = 1, we get =1 or, v1 = 60 kmph
=> v2 = 80 kmph and v3 = 120 kmph
Answer choice (a)

Correct Answer: 60 kmph

Our Online Course, Now on Google Playstore!

2IIM's App

Fully Functional Course on Mobile


Cache Content for Offline Viewing


Get it on Google Play
Visit Piverb.com
Visit Wizako.com

More questions from Speed Time, Races

  1. Speed Time - Races
  2. Speed Time - Geometry
  3. Speed Time - Cars
  4. Speed Time - Races
  5. Speed Change
  6. Speed Time - Meeting point
  7. Speed Time - Races
  8. Relative Speed
  9. Speed Time - Races
  10. Boats and Streams
  11. Relative Speed