SOLUTION: Joey and Sally are on a hiking trip. It will be dark in 1.5 hours. They have to decide whether to stop for the night or hike to the camp site at the base of a tower they can see in

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Joey and Sally are on a hiking trip. It will be dark in 1.5 hours. They have to decide whether to stop for the night or hike to the camp site at the base of a tower they can see in      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 502757: Joey and Sally are on a hiking trip. It will be dark in 1.5 hours. They have to decide whether to stop for the night or hike to the camp site at the base of a tower they can see in distance. They know the height of the tower is 315 metres and they use a clinometer to determine the angle of elevation to the top of the tower is 4.
Joey and Sally have been walking at 3.5 km/hr . Should they stop for the night or continue walking?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Joey and Sally are on a hiking trip. It will be dark in 1.5 hours.
They have to decide whether to stop for the night or hike to the camp site at the base of a tower they can see in distance.
They know the height of the tower is 315 metres and they use a clinometer to determine the angle of elevation to the top of the tower is 4.
:
Use the tangent of 4 degrees to find the distance (d) to the tower (side adjacent) and side opposite = 315
tan(4) = 315%2Fd
d = 315%2Ftan%284%29
d = 4507.71 meters ~ 4.5 km to the base of the tower
:
Joey and Sally have been walking at 3.5 km/hr .
Should they stop for the night or continue walking?
:
they are about 4.5 km from the tower, find the time to walk this dist at 3.5 km/hr
4.5%2F3.5 = 1.287 hrs, they should make it with about 13 min to spare