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A bus travels 84 km/h for 3 hours 40 minutes. Then it travels for 5 hours 20 minutes at 66 km/h. After that it covers 110 km in 2 hours. What is the average speed of the bus for the whole journey?1. 60 km/h2. 70 km/h3. 77 km/h4. 66 km/h |
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Answer» Correct Answer - Option 2 : 70 km/h As we know, overall average speed of the bus = (Total distance covered)/(Total time taken) = (84 × 11/3 + 66 × 16/3 + 110)/(11/3 + 16/3 + 2) = (28 × 11 + 22 × 16 + 110)/(27/3 + 2) = 11 × (28 + 32 + 10)/11 = 70 km/h |
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