A boy covers a distance of 20 km in five by 5 by 2 hours, partly on foot at the rate of 5 km/hour and partly on bicycle at the rate of 10 km /hour. Find the distance covered by foot. Please answer it quickly because it's my exam tomorrow and it may come.
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x distance in foot
20-x distance in bicycle
x/5+(20-x)/10=5/2
2x+20-x=25
x=5
bicycle = 15
20-x distance in bicycle
x/5+(20-x)/10=5/2
2x+20-x=25
x=5
bicycle = 15
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