Question
PSLE
Christopher and Harper started their walk around a 19-km track at 7.00 a.m. They started at the same point but went in opposite direction. Christopher's walking speed was 3 km/h and Harper was 2 km/h. They did not change their speeds throughout. At what time did they first pass each other?
2 m

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PSLE
Christopher and Harper started their walk around a 19-km track at 7.00 a.m. They started at the same point but went in opposite direction. Christopher's walking speed was 3 km/h and Harper was 2 km/h. They did not change their speeds throughout. At what time did they first pass each other?