Question
A truck travelled 13 of its journey at an average speed of 140 km/h. Find its average speed for the remaining 560 km if its average speed for the whole journey was 84 km/h.
2 m

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A truck travelled 13 of its journey at an average speed of 140 km/h. Find its average speed for the remaining 560 km if its average speed for the whole journey was 84 km/h.