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The speed of three cars are in the ratio 3 : 4 : 5. The ratio between times taken by them to travel the same distance is?

3 : 4 : 5
5 : 4 : 3
12 : 15 : 20
20 : 15 : 12

Correct Answer: 20 : 15 : 12

Explanation:

Ratio of time taken = 1/3 : 1/4 : 1/5 = 20 : 15 : 12

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