a car travels at a speed of 80 km per hour hour during the first half of its running time and at 40 km per hour during the other half find the average speed of the car
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Answered by
0
Answer:
Let the each half of the running time be t.
During first half time, speed of car is 80 km/h
Distance covered d
1
=80t km
During second half time, speed of car is 40 km/h
Distance covered d
2
=40t km
Total distance covered d=d
1
+d
2
=80t+40t=120t
Total time taken T=2t
Average speed v
avg
=
T
d
=
2t
1 ko20t
=60 km/hr
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Answered by
1
Answer:
60km/hour
Explanation:
speed of car in first half=80km/hour
speed of car in second half=40km/hour
therefore average speed of car = 80+40/2=120/2
=60km/hour
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