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  1. 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 ?
    1. 3 : 4 : 5
    2. 5 : 4 : 3
    3. 12 : 15 : 20
    4. 20 : 15 : 12
Correct Option: D

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


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