Multiple choice

The ratio of the speeds of three cars is (4 : 3 : 5). Then find the ratio of time taken by them to cover a distance of 80km.

  1. $\(5 : 3 : 4\)$
  2. $\(15 : 20 : 12\)$
  3. $\(6 : 5 : 9\)$
  4. $\(4 : 5 : 6\)$

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speeds are 4:3:5, times for same distance are inversely proportional: 1/4 : 1/3 : 1/5. LCM of denominators is 60, so ratios are 15:20:12. For 80km, each car's time is proportional to these ratios.

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