What is the distance between that two poles?

There are two poles of equal height 15mts. One cable with length 16mts is hanging between that two poles. The height from center of the cable to earth is 7mts then what is the distance between that two poles?

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Showing Answers 1 - 11 of 11 Answers

Saikalyan

  • Feb 11th, 2016
 

16 meters and the rope is straight without any curves

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Ravi

  • Feb 16th, 2016
 

The rope is making a parabola, whose height (a) is 15-7 = 8mts and width (b) we have to find. Now the perimeter of parabola is given to be 16mts. Now just apply the parabola-perimeter formula here and find b. b is the distance between these 2 poles.

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Geoffrey Wilkes

  • Apr 24th, 2017
 

8mtr

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mounika

  • May 27th, 2017
 

8mts

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Anjali

  • Aug 18th, 2017
 

Here distance between center of rope and earth is 7.
distance between center of the cable to pole height vertically = 15-7 =8
we can assume a parabola from the origin.(center of the cable) y = x^2
8=x^2
i.e x=2*2^0.5 =2.828 from the center of the rope to one pole
Distance between poles = 2*2.828 = 5.657mts

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