Sunday

January 25, 2015

January 25, 2015

Posted by **Alexis** on Wednesday, November 20, 2013 at 2:30am.

How many feet from tower 1 should point A be so that the total length of guy wire is minimal? Do not include units in your answer.

Distance from tower 1 to point A is???

- Math (Calculus) -
**Steve**, Wednesday, November 20, 2013 at 6:30amwithout a diagram, I assume point A is an anchor in between the towers. If its distance from T1 is x, then the cable length is

d = √(60^2+x^2) + √(20^2+(140-x)^2)

to find the minimum, we want dd/dx = 0

That happens when x=105

**Answer this Question**

**Related Questions**

calculus - Tower 1 is 90 ft high and tower 2 is 40 ft high. The towers are 200 ...

Math - Another question is a guy wire stretches from the top of an antenna tower...

Maths - A communications tower has many guy wires supporting it. Two of these ...

math last set up - To secure a 618 meter radio tower against high winds, guy ...

math - To secure a 500 meter radio tower against high winds, guy wires are ...

Precalc - A tower is supported by a guy wire 610 ft long. If the wire makes an ...

Pre-Calculus - A wire from the top of a TV tower makes an angle of 49.5 with the...

math - A guy wire is attached to a tower at a point that is 5.5m above the ...

Math - Two fire towers, A and B, are 20.3 km apart. From tower A, the bearing of...

Trigonometry - A communications tower is located at the top of a steep hill, as ...