SOLUTION: A boat goes 150 miles downstream in the same time it can go 120 miles upstream. The speed of the current is 6 miles per hour. Find the speed of the boat in still water.

Question 766497: A boat goes 150 miles downstream in the same time it can go 120 miles upstream. The speed of the current is 6 miles per hour. Find the speed of the boat in still water.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Boat speed speed x mph
current speed 6 mph
..
against current x - 6 mph
with current x + 6 mph

Distance against current 120
Distance with current 150
Time = same equate the time against with time with current
t=d/r
120 /(x- 6 )= 150 /(x+ 6 )
120 *(x+ 6 )= 150 *(x- 6 )
120 x + 720 = 150 x -900
120 x -150 x = -900 + -720
-30 x = -1620
/ -30
x= 54 mph
m.ananth@hotmail.ca

RELATED QUESTIONS
A boat goes 240 miles downstream in the same time it can go 160 miles upstream. The speed (answered by solver91311)

A boat goes 540 miles downstream in the same time it can go 450 miles upstream. The speed (answered by solver91311)

1. A boat goes 220 miles downstream in the same time it can go 180 miles upstream. The... (answered by richwmiller)

A boat goes 480 miles downstream in the same time it can go 400 miles upstream. The speed (answered by Alan3354)

Hello! A boat goes 630 miles downstream in the same time it can go 540 miles upstream. (answered by Fombitz)

A boat goes 540 miles downstream in the same time it can go 450 miles upstream. The speed (answered by solver91311)

a boat goes 560 miles downstream in the same time it can go 490 miles upstream. The speed (answered by ewatrrr)

a boat goes 180 miles downstream in the same time it can go 120 miles upstream the speed... (answered by mananth)

A boat goes 200 miles downstream in the same time it can go 150 miles up stream. The... (answered by Paul)