Saturday

October 25, 2014

October 25, 2014

Posted by **christine** on Thursday, January 26, 2012 at 2:33am.

- pysics -
**drwls**, Thursday, January 26, 2012 at 6:42amTo go straight across, you would have to paddle in an upstream direction with respect to the water. The velocity component across the river would then be sqrt(5^2 - 3^2) = 4 miles/h. The time to go across and back is then

T1 = 2 mile/4 mph = 0.5 hours = 30 minutes

To go 1 mile upstreeam and then down requires

T2 = 1/(5-3) + 1/(5+3) = 1/2 + 1/8 = 5/8 hr = 37.5 minutes.

**Answer this Question**

**Related Questions**

math - A kayak moves 10 miles per hour in still water. If the river current ...

Math - Jared can paddle his canoe 1 mile upstream in 1 hour, but it takes only a...

Math - Alicia went on a steamboat ride up the Mississippi River. The boat ...

math - Alicia went on a steamboat ride up the Mississippi River. The boat ...

Math - Alicia went on a steamboat ride up the Mississippi River. The boat ...

Intermediate Algebra - in still water, a paddle boat averages 10 miles per hour...

math - If I am in a canoe race and my friend is a half mile ahead of me, if I ...

math - A boat is rowed down a river a distance of 16 miles in 2 hours and it is ...

math - a steamboat goes 24 miles upstream, the trip takes six hours. the water ...

algebra - Rita’s boat has a top speed of 12 miles per hour in still water. While...