A car travel from A to B with the speed of 20km/h and from B To A with the speed of 30km/h find the average speed of whole journey.
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Answer:
1.2km/hr
Explanation:
let the distance be x.
time=x/20 A to B
time =x/30 B to A
A.S= x total dis. by total time
------
x + x
---- --- = 1.2km/hr
20 30
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