A truck travels for 30 km distance with a speed of 60 km/h and another 30 km with the speed of 90 km/h. find its average speed.
Answers
Answered by
1
Your total distance is 90 + 30 = 120 km
Your desired average speed = 60 kmph
Which means Total Time taken should be = 120/60 = 2 Hours
[Time = Distance / Speed]
For the first 30 km, you have already taken 1 hour,
So you have 1 hour to spare and 90 km to go, your speed for the remainder of the journey should be 90 kmph
Let’s check
Distance Speed Time
30 km 30 kmph 1 hour
90 km 90 kmph 1 hour
Total Distance 120 km
Total Time 2 hour Average Speed = Total Distance/ Total time = 120/2 = 60 kmph
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Answered by
1
Answer:
speed = total distance/ total time
add the distances, u get 60
add the time, u get 1500
60/1500 = 25 km/h
Step-by-step explanation:
hope this helps
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