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A car travels first 30km with a uniform speed 60om/h and then next 30km with uniform speed of 40km/h calculate total to me of the journey and average speed. |
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Answer» total TIME =1hr. 15min. average Speed=48kh/hr Explanation: time T1 to TRAVEL first 30km=distance/time =30/60=1/2hr time T2 to travel NEXT 30km= 30/40= 3/4hr total time of journey=T1+T2= (1/2)+(3/4)= 5/4hr. that is = 1hr.15min. average speed=total distance/total time =60/(5/4)=48km/hr |
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