Friday

October 24, 2014

October 24, 2014

Posted by **kay** on Monday, October 3, 2011 at 11:30pm.

- geometry -
**tchrwill**, Tuesday, October 4, 2011 at 10:50am1--Let A and B = the two height of the two poles.

2--Let X = the height of the poles crossing.

3--Let C be the distance between the two poles.

4--From the figure, A/C = X/Y or AY = CX.

5--Similarly, B/C = X/(C - Y) or BY = BC - CX.

6--Y = CX/A = (BC - CX)/B from which X = AB/(A+B).

Note - X is actually one half the harmonic mean of the two dimensions A and B, the harmonic mean being 2AB/(A + B).

Therefore, the height of the crossing is totally independant of the distance between the two buildings.

- geometry -
**Steve**, Tuesday, October 4, 2011 at 10:53amThe height h is given by 1/h = 1/60 + 1/20

h = 15'

This is true regardless of the width of the field.

- geometry -
**hannah**, Wednesday, September 24, 2014 at 6:36pmTHANK YOU TCHRWILL

**Answer this Question**

**Related Questions**

math - There are two poles. One is 60 feet tall and the other is 8 feet tall. ...

Math - Two poles are 20 feet tall and 30 feet tall, respectively. If they are 30...

math - the nufone communications company must run a telephone line between two ...

PRE ALGEBRA - solution to electrical poles that carry electrical wire seem to ...

math - There are two 100-foot poles. A 150-foot rope connects them at the top. ...

Calculus - A cable hangs between two poles of equal height and 40 feet apart. At...

Geometry/Math - Judy lies on the ground 45 feet from her tent. Both the top of ...

maths geometry - two poles 15 meter and 30 meter high stand upright in a ...

geometry - Tree stands 25 feet tall and 15 feet wide base 7.5 feet . You want to...

Precalculus - A woman who is 6 feet tall stand near a light that is 13 feet tall...