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

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