a person travels initially from Delhi with 400 km/h and he takes to over for returning it from Agra to Delhi distance between Agra and Delhi is just 800 km find speed of person in case of retardation.
Answers
Answered by
1
Let the each half of the running time be t.
During first half time, speed of car is 80 km/h
Distance covered d1=80t km
During second half time, speed of car is 40 km/h
Distance covered d2=40t km
Total distance covered d=d1+d2=80t+40t=120t
Total time taken T=2t
Average speed vavg=Td=2t120t=60 km/hr
Answered by
0
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
Option C is correct
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