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if a student goes to school at 2.5 km/hour, he reaches 6 mintues late. If he travels at 3 km/hour, he reaches the school 10 miutes early. what is the distance from his house to school
lets convert kmph to meters per minute.
2500/60 = 41.66 meters per minute
3000/60 = 50 meters per minute
41.66(t+6) = 50(t-10)
t = 90 minutes
there for distance is 50(90-10) = 4000 meters = 4km
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