A vehicle covers a distance of 40 km in first hour and a distance 60 km in second hour of its motion. Its average speed of motion is
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its average speed of motion is." One expert replied it '50 kmph' but a boy in my class assumed that because of 40 km in 1 hour, speed1 is 40 kmph and because of 60 km in 1 hour, speed2 is 60 kmph and then he used a new formula for average speed. to get the answer as 48 kmph and my teacher said it as the correct one.
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