Monday

March 30, 2015

March 30, 2015

Posted by **Kaley** on Monday, September 12, 2011 at 10:48pm.

- Algebra -
**Reiny**, Monday, September 12, 2011 at 11:01pmlet the speed of the current be x mph

so rate upstream = 5-x mph

and rate downstream = 5+x mph

then

19/60 (5-x) = 13/60 (5+x)

19(5-x) = 13(5+x)

95 - 19x = 65 + 13x

30 = 32x

x = 30/32 mph or .9375 mph

total distance = 13/60(5.9375) = 1.296 miles each way.

check:

rate against current = 4.0625

rate with the current = 5.9375

time against current = 1.296/4.0625 = .316 hrs = 19.4 minutes

time with current = 1.296/5.9375 = .2183 = 13.1 minutes

(Acceptable round-off error)

**Answer this Question**

**Related Questions**

College Algebra - A boy can row a boat at a constant rate of 5 mi/hr in still ...

Math - Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/...

7th Grade Math - Toni rows a boat 4.5km/h upstream and then turns around and ...

math - a man rows downstream for one hour and 40 minutes on a river flowing at 2...

physics - Sheena can row a boat at 3.13 mi/h in still water. She needs to cross ...

physics - Sheena can row a boat at 2.90 mi/h in still water. She needs to cross ...

math - a man can row a bangka at a rate of 5 km/h in still water. It takes 10 ...

PHYSICS - Sheena can row a boat at 2.91 mi/h in still water. She needs to cross ...

algebra - could you please show me how to do this problem? Bob rows 6 miles ...

word problem - A motor boat took 4 hours to make a downstream trip with a ...