a race car driver drove on a 4km long race course at an average speed of 120km/h for the first 2km. How fast does he have to go the second 2km to average 240km/h for the entire course.
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a race car driver drove on a 4km long race course at an average speed of 120km/h for the first 2km. How fast does he have to go the second 2km to average 240km/h for the entire course.
We are not here to do your maths homework.