October 9th, 2012, 03:23 PM  #1 
Joined: Aug 2012 From: South Carolina Posts: 866 Thanks: 0  Army Helicopter math problem
A Black Hawk Down Army million dollar helicopter is flying a mile high in the sky. It flyes over computerized cannons that are at Desert Ground Level. When the Army helicopter is 10 miles out horizontally from these cannons the cannons computers sense the helicopters distance is changing at a rate of 200mph. How fast is the Black Hawk Down Helicopter traveling. Who can solve 
October 9th, 2012, 03:59 PM  #2 
Senior Member Joined: Sep 2007 Posts: 2,409 Thanks: 5  Re: Army Helicopter math problem
I can. Thank you for your concern. Or did you want someone to solve it for you? I won't but I will give some pointers you can use the Pythagorean theorem to write the direct distance from the cannon to the helicopter (that's the hypotenuse of a right triangle) in terms of the horizontal distance (one of the legs the other leg is the constant altitude). Then differentiate both sides of that equation with respect to time. 
October 9th, 2012, 04:47 PM  #3  
Global Moderator Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 3  Re: Army Helicopter math problem Quote:
p.s. due to my low activity level of late, I might need someone else to run the awards this year  
October 9th, 2012, 08:17 PM  #4 
Joined: Aug 2012 From: South Carolina Posts: 866 Thanks: 0  Re: Army Helicopter math problem
haha you know what they say, MISERY LOVES COMPANY LOL well I shall not participate! 
October 9th, 2012, 08:49 PM  #5 
Global Moderator Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 11,808 Thanks: 267 Math Focus: The calculus  Re: Army Helicopter math problem
I would draw a sketch such as: [attachment=0:2b5g66o5]coptercannon.jpg[/attachment:2b5g66o5] We are given: Perform the indicated differentiation, and solve for . 
October 9th, 2012, 09:25 PM  #6 
Joined: Aug 2012 From: South Carolina Posts: 866 Thanks: 0  Re: Army Helicopter math problem
practice practice practice I need more practice

October 10th, 2012, 07:58 AM  #7 
Senior Member Joined: Sep 2007 Posts: 2,409 Thanks: 5  Re: Army Helicopter math problem
By the way, while the U.S. army does use a "Black Hawk" helicopter, calling it a "Black Hawk down" helicopter is really, really, tacky!

October 10th, 2012, 12:15 PM  #8 
Joined: Aug 2012 From: South Carolina Posts: 866 Thanks: 0  Re: Army Helicopter math problem
@HallsofIvy I agree with you 

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