A car travels a certain distance from town a to town b at the speed of 42 km/h and from town b to town a at a speed of 48 km/h. what is the average speed of the car
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45 km/h is the average speed of the car
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Step-by-step explanation:
let the 2 equal distances are covered at speed x km/h, then the average speed of the journey -2xy/x+y
Hence,average speed of the car=2x42x48/42+48
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