Question
A car travelled 14 of its journey at an average speed of 105 km/h. Find its average speed for the remaining 630 km if its average speed for the whole journey was 70 km/h.
2 m

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A car travelled 14 of its journey at an average speed of 105 km/h. Find its average speed for the remaining 630 km if its average speed for the whole journey was 70 km/h.