what is the average speed of 80km/j during the first half of its running time and at 50 km/h during the other half . Find tho average speed of the car
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Answer:
60 km / hr
Explanation:
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
120t
=60 km/hr
thankyou.
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