Question
Jane and Charlie started biking at 9.50 a.m. along 9-km trail. Jane took 30 minutes to reach the finishing point. Charlie’s speed was 12 km/h slower than Jane’s. At what time did Charlie reach the finishing point?
3 m

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Jane and Charlie started biking at 9.50 a.m. along 9-km trail. Jane took 30 minutes to reach the finishing point. Charlie’s speed was 12 km/h slower than Jane’s. At what time did Charlie reach the finishing point?