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Question 1:
Three trains are running 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 trains will be
A. 4 : 3 : 5
B. 5 : 3 : 4
C. 15 : 9 : 20
D. 15 : 20 : 12
Feedback Ratio of speeds = 4 : 3 : 5
Therefore Ratio of times taken [t=d/s or t indirectly proportional to s when distance is same]
=> (1/4) : (1/3) : (1/5) = 15 : 20 : 12

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