Sunday

March 1, 2015

March 1, 2015

Posted by **Nancy** on Thursday, April 5, 2012 at 1:25pm.

mi/hr?

- Math -
**Reiny**, Thursday, April 5, 2012 at 1:36pmlet the speed of the river be x mph

speed up stream = 12-x mph

time to go upstream = 24/)12-x)

speed downstream = 12+x

time to go downstream = 12/(12+x)

but those times are equal, so ...

24/(12-x) = 12/(12+x)

cross-multiply and solve for x

**Answer this Question**

**Related Questions**

algebra - 36 Upstream, downstream. Junior’s boat will go 15 miles per hour in ...

algebra - Show a complete solution. Upstream, downstream. Junior’s boat will go ...

Math - Steve's boat will go 14 miles per hour in still water. If he can go 13 ...

Math Word Problem - Steve's boat will go 14 miles per hour in still water. If he...

Math - A boat, which moves at 18 mph in still water, travels 14 miles downstream...

intermediate algebra - a motorboat moves 25 miles per hour in still water. it ...

math - The speed of a stream is 6 mph. If a boat travels 52 miles downstream in ...

math - A tugboat can go 10 miles upstream in the same time as it can go 15 miles...

Math - Brian's boat has a top speed of 9 miles per hour in still water. While ...

math - A river has a current of 4 mph. Find the speed of Simon’s boat in still ...