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Three persons are walking from a place A to another place B. Their speeds are in the ratio of 4 : 3 : 5. The time ratio to reach B by these persons will be

 Three persons are walking from a place A to another place B. Their speeds are in the ratio of 4 : 3 : 5. The time ratio to reach B by these persons will be :
[A] 4 : 3 : 5
[B] 5 : 3 : 4
[C] 15 : 9 : 20
[D] 15 : 20 : 12


ANS: D
Explanation:
Ratio of speeds = 4 : 3 : 5
Therefore Ratio of times taken = (1/4) : (1/3) : (1/5) = 15 : 20 : 12

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