Question
PSLE
Jack and Erika started jogging at the same time from point N to point Q along the route shown. Jack jogged 20 m/min faster than Erika. When Jack reached point Q, he turned around at once to jog towards point N. He met Erika at point P. They did not change their speeds throughout. What was Erika's jogging speed in m/min?
2 m

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PSLE
Jack and Erika started jogging at the same time from point N to point Q along the route shown. Jack jogged 20 m/min faster than Erika. When Jack reached point Q, he turned around at once to jog towards point N. He met Erika at point P. They did not change their speeds throughout. What was Erika's jogging speed in m/min?