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Cable and Pillars Problem
Hi guys,
An electricity cable, 16 meters in length, hangs between two pillars that are both 15 meters high.
The ends of the cable are attached to the tops of the pillars.
At its lowest point, the cable hangs 7 meters above the ground.
Then..............
How far the two pillars apart ?????
Try........
Best of Luck.........
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Contributing Member
Re: Tricky problem..........
pillar height = 15 meters
cable length = 16 meters
lowest point = 7 meters from ground
The sentence "The ends of the cable are attached to the tops of the pillars" is important here.
pillar height - lowest point = 15 - 7 = 8 meters
so up and down it should need 8 * 2 = 16 meters
so the distance between two pillars = cable length - 16 meters = 0 meters.
So Both pillar stand next to each other...
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Re: Tricky problem..........
Hi friend,
The distance b/w the 2 pillars is 0.
Actually it's a tricky question.
Congrats & keep it up.
Regards,
Riju.
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Junior Member
Re: Cable and Pillars Problem
shldnt it involve calculation of length of a major axis of ellipse .
sqrt((a+b)^2-f^2)
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