Question
PSLE
Jen and Elsa started jogging from the same point of the 10 km track round a nature reserve. They started at the same time but in opposite directions. Jen jogged past Elsa after 4 km. Both of them did not change their speeds throughout. Jen took 40 min to complete one round. What was Elsa's jogging speed in m/min?
3 m

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PSLE
Jen and Elsa started jogging from the same point of the 10 km track round a nature reserve. They started at the same time but in opposite directions. Jen jogged past Elsa after 4 km. Both of them did not change their speeds throughout. Jen took 40 min to complete one round. What was Elsa's jogging speed in m/min?