a car travels at a speed of 80 kilometre per hour during the first half of its running time and at 40 kilometre per hour during the other half find the average speed of the car...
Answers
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 120t
=60 km/hr
Option C is correct.
Explanation:
mark my ans brainiest
Answered by
1
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
120t
=60 km/hr
Option C is correct.
Similar questions