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a car travels hundred kilometre at a speed of 60 km per hour and returns with a speed of 40 km per hour calculate the average speed for the whole journey |
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Answer» Answer: 50km/hr Step-by-step EXPLANATION: average speed of an object that travels DIFFERENT DISTANCES in equal time=speed 1+speed 2+...../no. of different speeds which were travelled by an object so according to the PROBLEM speed 1=60 km/hr. speed 2=40km/hr so average speed = 60 +40 /2 = 100/2 = 50km/hr |
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