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A bus covers 3 equal distances. The first is covered with a speed 10km/h, second with speed 20km/h and third with 60km/h, then find its average speed in km/h. |
| Answer» A bus covers 3 equal distances. The first is covered with a speed 10km/h, second with speed 20km/h and third with 60km/h, then find its average speed in km/h. | |