1.

A man travels 200 km distance with the speed of 40 m/s and next 50 km with the speed of 10 m/s . Find the average speed of man.

Answer»

14(2/7)km/hr
14(5/7) km/hr
15.6 km/hr
none of these

Solution :AVERAGE SPEED = (200+300+500)/((200/40)+(300/20)+(500/10))=14.2857 km/hr


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