SOLUTION: A boat travels at a speed of 20 miles per hour, relative to the water, as it makes a trip downstream and then returns. if the initial trip downstream takes the boat 30 minutes and

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Question 897831: A boat travels at a speed of 20 miles per hour, relative to the water, as it makes a trip downstream and then returns. if the initial trip downstream takes the boat 30 minutes and the return trip upstream takes the boat 40 minutes, what is the speed of the current?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

Previously Posted

D = rt

%2820mph%2Bc%29%281%2F2%29+=+%2820mph-c%29%282%2F3%29|Multiplying thru by 6 so as all denominators = 1 

%2820mph%2Bc%293+=+%2820mph-c%294

   7c = 20

    c = 20/7 mph