Problema Solution
A grain barge travels on a river from Point A to Point B.The barge travels at a rate of 12 miles per hour relative to the water.The river flows downstream at a rate of 1 mile per hour.If the trip upstream takes two hours longer than the trip downstream, how far is it from point A to Point B?
Answer provided by our tutors
suppose the distance between A and B is x
it take t hours to trip downstream so it takes (t+2) to trip upstream
x = (12+1)t
x= (12-1)(t+2)
t = 11 hours
so the distance is 143 miles