Question
PSLE
Gem and Mary 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. Gem jogged past Mary after 8 km. Both of them did not change their speeds throughout. Gem took 30 min to complete one round. What was Mary's jogging speed in m/min?
3 m

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PSLE
Gem and Mary 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. Gem jogged past Mary after 8 km. Both of them did not change their speeds throughout. Gem took 30 min to complete one round. What was Mary's jogging speed in m/min?