-
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.0
-
Member • Mar 21, 2011
But what is the radius of circle of which this arc (cable) is part of?
I think the data is insufficient. 😀
But good question.Are you sure? This action cannot be undone. -
Member • Mar 21, 2011
Nope. Data is complete. Try HarderAre you sure? This action cannot be undone. -
Member • Mar 21, 2011
The answer will be in terms of angle subtended by chord. The answer will be less than 16m.
The answer is 2*R*Sin(A/2)
Where R is the radius of arc subtended by cable( which is hanging)
A is the angle subtended by the Top points of two poles with center of circle. 😁Are you sure? This action cannot be undone. -
Member • Mar 21, 2011
incorrect 😔Are you sure? This action cannot be undone. -
Member • Mar 21, 2011
Is the answer nearing 3.5 to 4m?
I got it by simple geometry. Though the curve is elliptical so I won't be able to tell the answer exactly.Are you sure? This action cannot be undone. -
Member • Mar 21, 2011
it is less than 4mAre you sure? This action cannot be undone. -
Member • Mar 22, 2011
yes, but you can calculate the exact valueAre you sure? This action cannot be undone. -
Administrator • Mar 22, 2011
The answer is that the two poles are not apart. Let us suppose x is the distance between the two poles.
Now we have x/2 + (15-7) <= 16/2. This is not possible. So is the answer 0 meters?Are you sure? This action cannot be undone. -
Member • Mar 22, 2011
Yes, you are correct. Answer is 0. the poles are not apart. The length of the cable is 16 m. so for its to hang 8m above the ground the poles have to be 0m apart.Are you sure? This action cannot be undone. -
Member • Mar 22, 2011
Re:technical answ?
data is sufficient.we have to think technically!!!!Are you sure? This action cannot be undone. -
Member • Mar 22, 2011
PLease explain how you get this inequality ?AbraKaDabraThe answer is that the two poles are not apart. Let us suppose x is the distance between the two poles.
Now we have x/2 + (15-7) <= 16/2. This is not possible. So is the answer 0 meters?Are you sure? This action cannot be undone. -
Member • Mar 23, 2011
Given poles are of 15 mtrs height each,and the rope is hanging above 7 mtr from ground. Rope is of length 16 metre.
Though it is hanging between two poles top, its height must be divided by 2.(We get quotient as 8)
if the distance of the rope from the ground
=Height of the pole-quotient then the distance between them is zero.
<Height of the pole-quotient then there is some distance between them
>Height of the pole-quotient then it is impossible.
Here the 1st case satisfies, i.e. 7=15-8 , so the distance between the two poles is zero.Are you sure? This action cannot be undone. -
Member • Mar 31, 2011
distance between two poles =0Are you sure? This action cannot be undone.