Related Rates Help! "A lighthouse is stationed at a point P...."

E

efking

New member
Joined
Oct 17, 2015
Messages
1
A lighthouse is stationed at a point P some distance away from the nearest point Q on a straight shoreline. It is found that the beam of light is moving alon the shore at a rate of 220pi m/s when it passes a point R on the shoreline 1km away from Q. How far away is the lighthouse from the shoreline?

I've done a bunch others like this, but in this particular situation I keep cancelling out the variable I'm solving for when I differentiate... Please help if you can! :)
 
efking said:
A lighthouse is stationed at a point P some distance away from the nearest point Q on a straight shoreline. It is found that the beam of light is moving alon the shore at a rate of 220pi m/s when it passes a point R on the shoreline 1km away from Q. How far away is the lighthouse from the shoreline?

I've done a bunch others like this, but in this particular situation I keep cancelling out the variable I'm solving for when I differentiate... Please help if you can!
Click to expand...
We'll be glad to help! Please reply showing your steps so far, so we can try to find where things are going sideways. Thank you! ;)
 
You must log in or register to reply here.
Top