A train travels at a speed of 50 km/ hr for 0.5 hr,at 30 km/ hr for next 0.26 hr and 70 km/hr for next 0.76 hr.what is the average speed of train
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Average speed = total distance/total time
=(50/0.5+30/0.26+70/0.76)/(0.5+0.26+0.76)
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Formula:
Average speed = total distance / total time
Total distance :
Distance = Speed × time
( 30 × 0.26) + (50 × 0.5) + ( 70 × 0.76) = 86km
total time :
0.5 + 0.26 + 0.76 = 1.52 hrs
Average speed = 86/1.52 = 56.58
= 56.58 km/h
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