Question
PSLE
Mary and Jem started jogging from the same point of the 12 km track round a nature reserve. They started at the same time but in opposite directions. Mary jogged past Jem after 10 km. Both of them did not change their speeds throughout. Mary took 15 min to complete one round. What was Jem's jogging speed in m/min?
3 m

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PSLE
Mary and Jem started jogging from the same point of the 12 km track round a nature reserve. They started at the same time but in opposite directions. Mary jogged past Jem after 10 km. Both of them did not change their speeds throughout. Mary took 15 min to complete one round. What was Jem's jogging speed in m/min?