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Jenny and Kenny took part in a cycling race.In 15 minutes, Jenny had completed only `5/8` of the race while Kenny had already completed the race.
Jenny's average speed for the race was 240 m/min slower than Kenny's.
(a) What is the distance of the race?
(b) What is Jenny's average speed in m/min ?
(c) What is Kenny's average speed in km/h ?
Notes to student: