A car travel from A to B at a speed 20kmh^-1m and returns at a speed of 30kmh^-1.The average speed of the car for the whole journey is
Answers
Answered by
3
Answer:
the average speed formula is distance by time taken
Answered by
3
Answer:
24 kmph
Explanation:
Average Speed = Total Distance / Total Time
Distance = Speed x Time
Suppose the distance between A and B is y
time taken moving from A to B = y /20 kmph = y /20 hr
time taken moving from B to A = y /30 kmph = y /30 hr
Total Time = y / 20 hr + y / 30 hr
taking L.C.M
T =30 y+20 y/600
T= (50/600)x hr
Total Distance = 2 y
Average Speed = (2y)/[(50/600)(y)] =1200/50 kmph = 24 kmph
Similar questions