SOLUTION: from a point on a straight river, one boat is driven upstream at 9 miles per hour, and another boat is driven downstream at 8 miles per hour. In how many hours will they be 34 mile

Question 931717: from a point on a straight river, one boat is driven upstream at 9 miles per hour, and another boat is driven downstream at 8 miles per hour. In how many hours will they be 34 miles apart?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = speed of current
---
relative speed of the two boats:
(9 - x) + (8 + x)
9 + 8 - x + x
9 + 8 = 17 mph
---
s = d/t
t = d/s
---
t = 34/17
t = 2
---
answer:
in 2 hours they'll be 34 miles apart
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
RELATED QUESTIONS
a motor boat can travel 15 miles per hour downstream and 9 miles upstream per hour on a... (answered by scott8148)

From a point on a river, two boats are driven in opposite directions, one at 9 miles per... (answered by ikleyn)

A motorboat can travel 15 miles per hour downstream and 9 miles per hour upstream on a... (answered by Alan3354)

A motorboat can travel 15 miles per hour downstream and 9 moles per hour upstream on a... (answered by Boreal)

from a point on a river,two boats are driven in opposite directions, ones at 9 miles per... (answered by ewatrrr)

From a point on a river, two boats are driven in opposite directions, one at 10 miles per (answered by ptaylor)

From a point on a river, two boats are driven in opposite directions, one at 10 miles per (answered by richwmiller)

From a point on a river, two boats are driven in opposite directions, one at 10 miles per (answered by solver91311)

From a point on a river,two boats are driven in opposite directions, one at 6 miles per... (answered by ad_alta)