Sohan went from his residence to the office covering a distance of 48.5 km in 30 minutes. In the evening, he returns from the office covering the same distance in 50 minutes. Find the average speed.
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Explanation:
speed 1 = d/t = 48.5 /0.5= 97kmph
then
speed 2= d/t = 48.5 / 0.83 = 58 kmph
so , average = S1 +S2/2 = 97+58/2 = 77.5kmph
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