A car goes from a town A to another town B with a speed of 40 km/h and returns back to the
town A with a speed of 60 km/h. Calculate the average speed of the car.
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Speed taken to go town A to town B=40 km/hr
Speed of car from going station B to A=60 km/hr
Let the distance be x km
Then the time will be distance /speed
For A to B, Time taken=x/40 (t 1)
For B to A, Time taken=x/60 (t 2)
Total time =t 1 + t 2
=>x/40 + x/60 =( 3x + 2x)/120
-> 5x/120 = x/24
Average speed = Total distance / Total time
2x/x/24 = 48 km /hr
ANSWER = 48 km /hr
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