Question
Betty and Mark started biking at 9.50 a.m. along 10-km trail. Betty took 30 minutes to reach the finishing point. Mark’s speed was 14 km/h slower than Betty’s. At what time did Mark reach the finishing point?
3 m

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Betty and Mark started biking at 9.50 a.m. along 10-km trail. Betty took 30 minutes to reach the finishing point. Mark’s speed was 14 km/h slower than Betty’s. At what time did Mark reach the finishing point?