Question
PSLE
Riordan and Abigail started their walk around a 23-km track at 6.00 a.m. They started at the same point but went in opposite direction. Riordan's walking speed was 4 km/h and Abigail 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
Riordan and Abigail started their walk around a 23-km track at 6.00 a.m. They started at the same point but went in opposite direction. Riordan's walking speed was 4 km/h and Abigail was 2 km/h. They did not change their speeds throughout. At what time did they first pass each other?