IGCSE MATHEMATICS 0580/43/O/N/20 Q3
3 (a) The average speeds, in km/h, of cars travelling along a road are recorded.
The box-and-whisker plot shows this information.
(i) the lowest speed recorded,
(ii) the median,
(iii) the interquartile range.
(b) Another car takes 18 seconds to travel 400m along this road.
Calculate the average speed of this car in km/h.