Question
Barbara and Warren started biking at 9.45 a.m. along 9-km trail. Barbara took 30 minutes to reach the finishing point. Warren’s speed was 12 km/h slower than Barbara’s. At what time did Warren reach the finishing point?
3 m

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Barbara and Warren started biking at 9.45 a.m. along 9-km trail. Barbara took 30 minutes to reach the finishing point. Warren’s speed was 12 km/h slower than Barbara’s. At what time did Warren reach the finishing point?