Tuesday

March 31, 2015

March 31, 2015

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

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

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

Math! Helppppp - Two poles are place 15 feet apart. One pole is 8 ft high and ...

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

math - A street light is at the top of a 16.0 ft. tall pole. A man 5.9 ft tall ...

math - A street light is mounted at the top of a 19-ft-tall pole. A man 5.5 feet...

calculus - A street light is at the top of a 15.000 ft. tall pole. A man 6.300 ...

geometry - A cable 22 feet long runs from the top of a utility pole to a point ...

Mathsw - A man 6 feet tall is standing 9 feet from a 18 feet tall light pole. ...