4) A truck covers 30 km in the first hour,40km in the second hour and
60km on the third hour. What is the average speed of the truck
during the whole journey?
Answers
Answered by
6
Answer:
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
Good Luck
Answered by
0
Answer:
the truck undergoes a non uniform motion
therefore average speed
30+40+60/3
130/3
A.V Speed- 43.44 km/h
Similar questions