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bactomac | 13:19 Wed 31st Dec 2008 | Quizzes & Puzzles
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Two vertical poles on level ground have heights 8m and 3m. The top of each is connected to the base of the other by a rope. At what height do the ropes intersect?
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Avatar Image Mamyalynne
2 metres i think
14:02 Wed 31st Dec 2008
Avatar Image Mamyalynne
try it on a lined sheet of paper using a line per metre and it works however far apart you put them, am sure theres a formula LOL
14:04 Wed 31st Dec 2008
Avatar Image Petal
If the poles are d metres apart, then draw a picture with a line representing the height meeting the ground vertically - say this is x metres from the 3 m pole, it is therefore d-x metres from the 8 m pole.

You then have two simple equations: x/h=d/8, and (d-x)/h=d/3.

Eliminate x from these and h comes out as (8 x 3)/(8+3) m = 2.182m
14:32 Wed 31st Dec 2008

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