Mr.And travels 25 km in his car with a constant speed of 50km/hr to drop his daughter to school on time and another 50 km with a constant speed of 80km/hr to reach his office will on time a) How long did it take for this trip ?
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
= Td
= 2t 120t
=60 km/hr
Answered by
0
Answer:
60 km / hr
Explanation:
hope its correct thank you ~♥~
Similar questions