31. | Two, trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is: |
a. | 2 : 3 |
b. | 4 : 3 |
c. | 6 : 7 |
d. | 9 : 16 |
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Answer: (b).4 : 3
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