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If a bus covers 195 km distance in 3 hours and a train covers 300 km distance in 4 hours, then the ratio of their speeds is:
1. 13 ∶ 12
2. 12 ∶ 13
3. 13 ∶ 15
4. 15 ∶ 13

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Correct Answer - Option 3 : 13 ∶ 15

Formula used:

Speed = Distance/Time

Calculation:

Speed of Bus = 195/3

Speed of Train = 300/4

Ratio of speed of Bus and Train = \(\frac{195}{3} \times \frac{4}{300}\)

∴ The ratio of their speed = 78 : 90 or 13 : 15

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