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Answer : 2 20 min Explanation : Answer: B) 20 min Explanation: In 1hr, the bus covers 60 km without stoppages and 40 km with stoppages.Stoppage time = time take to travel (60 - 40) km i.e 20 km at 60 km/hr.stoppage time = 20/60 hrs = 20 min.

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