# camp site angle problem

• Feb 4th 2007, 08:31 PM
rcmango
camp site angle problem
heres a pic of what were looking at: http://img183.imageshack.us/img183/8004/untitledqa0.jpg

A hiker needs to cross a sandy area in order to get from point A to a camp site at point B. He can do so by crossing the sand perpendicular to the trail and then walking along the trail, or by crossing the sand in an anle theta up to the trail, and then walking along the trail. The hiker walks 3.5 km/h in the san and 5 km/h on the trail. Determine the time it will take him to reach the camp site for theta = 0, 10, 20, 30, 40, 50 and 60 degrees.

not sure how to do this one. help is needed please.
• Feb 5th 2007, 03:53 AM
topsquark
Quote:

Originally Posted by rcmango
heres a pic of what were looking at: http://img183.imageshack.us/img183/8004/untitledqa0.jpg

A hiker needs to cross a sandy area in order to get from point A to a camp site at point B. He can do so by crossing the sand perpendicular to the trail and then walking along the trail, or by crossing the sand in an anle theta up to the trail, and then walking along the trail. The hiker walks 3.5 km/h in the san and 5 km/h on the trail. Determine the time it will take him to reach the camp site for theta = 0, 10, 20, 30, 40, 50 and 60 degrees.

not sure how to do this one. help is needed please.

Well, d = vt, so $t = \frac{d}{v}$, which you can calculate for each part of the path.

That is, you can calculate it if you are given any distances. :eek:

-Dan
• Feb 5th 2007, 08:14 AM
rcmango
oh, forgive me, i forgot to add the distances of w = 4.5km and u = 14km.

now i see, thanks alot!