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

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