speed
Asked by | 12th Feb, 2009, 10:20: PM
Expert Answer:
let the speed is x. so we have total distance = total time * speed
total distance is 24 km
during upstream speed is 11 + x so time = 12 / 11+x
during downstrem speed is 11 - x so time is = 12 / 11 - x
we have 12 / 11+x + 12 / 11 - x = 2hours45minutes = 11 / 4
solving we get x = 5 km/hr
Answered by | 12th Feb, 2009, 10:51: PM
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