Question
PSLE
Ken and Shiyun started jogging at the same time from point P to point R along the route shown. Ken jogged 40 m/min faster than Shiyun. When Ken reached point R, he turned around at once to jog towards point P. He met Shiyun at point Q. They did not change their speeds throughout. What was Shiyun's jogging speed in m/min?
2 m

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PSLE
Ken and Shiyun started jogging at the same time from point P to point R along the route shown. Ken jogged 40 m/min faster than Shiyun. When Ken reached point R, he turned around at once to jog towards point P. He met Shiyun at point Q. They did not change their speeds throughout. What was Shiyun's jogging speed in m/min?