A cyclist takes a ride lasting 25s. The diagram shows how her distance travelled from the starting position varies with time. 150 distance travelled/m 100 50 5 10 15 20 25 time / s what is her average speed for the whole ride?
(a) 6.0 m/s
(b) 7.5 m/s
(c) 10.0 m/s
(d) 11.0 m/s
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