A man covers first 70 km of a journey at 35km/hr and the remaining 40km at 10 km/hr.Find the average speed of the whole journey
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first time (t1) = distance/speed
=70/35=2 hours
second time (t2)= 40/10
= 4 hours
average speed = total distance / total time
= 70 + 40 / 2+4
= 1.8 km/hr
=70/35=2 hours
second time (t2)= 40/10
= 4 hours
average speed = total distance / total time
= 70 + 40 / 2+4
= 1.8 km/hr
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Answered by
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{ Accirding to question }
Case 1 :- Distance covered by man with speed is as follow,
Distance = 70 km & Speed = 35 km/hr
Case 2 :- Distance covered by man with speed is as follow,
Distance = 40 km & Speed = 10 km/hr
Now we need to find time for case 1 we use formula
2 hour taken by person to cover 70 km with speed 35 km/hr.
Now we need to find time for case 2 we use formula
4 hour taken by person to cover 40 km with speed 10 km/hr.
Now, to calculate average speed
Hence average speed of the whole journey is 18.33 km/hr.
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