SOLUTION: To get to his parents house John must travel at a speed of 60m/hr on land then use a motor boat whos speed is 20 mi/hr in still water. John goes by land to a dock and then travels

Question 39981: To get to his parents house John must travel at a speed of 60m/hr on land then use a motor boat whos speed is 20 mi/hr in still water. John goes by land to a dock and then travels on a river against a current of 4 mi/hr. He reaches his parents home in 4.5 hrs. The return trip takes him 3.5 hrs. How far does his parents live from his house?
thanx
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
Total time = 4.5+3.5=8 hours
EQUATION:

16x+60x=7680
76x=7680
x=101 (rounded)
Hence, the distance is 101 miles.
Paul.
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