Question
PSLE
Della and Mia started jogging from the same point of the 15 km track round a park. They started at the same time but in opposite directions. Della jogged past Mia after 12 km. Both of them did not change their speeds throughout. Della took 30 min to complete one round. What was Mia's jogging speed in m/min?
3 m

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PSLE
Della and Mia started jogging from the same point of the 15 km track round a park. They started at the same time but in opposite directions. Della jogged past Mia after 12 km. Both of them did not change their speeds throughout. Della took 30 min to complete one round. What was Mia's jogging speed in m/min?