# Distance between two points

#### Denis

##### Senior Member
Well, hello to you too!

Are you asking what the shape of the cable is?
If so, go here:

#### Harlicks

##### New member
It's in the question, the distance between the poles is required

#### MarkFL

##### Super Moderator
Staff member
Hint: This is a bit of a trick question...consider the poles moving closer and closer to each other.

#### Harlicks

##### New member
I solved it and got zero

#### MarkFL

##### Super Moderator
Staff member
I solved it and got zero
Yes, if the cable is 80 m long, and goes down 40 m and then back up 40 m, then the poles must be at the same location, or 0 m apart.

#### Denis

##### Senior Member
Yes, if the cable is 80 m long, and goes down 40 m and then back up 40 m, then the poles must be at the same location, or 0 m apart.
Beautyfull! Mark, you should take the "Amazon Test": you'll ace it!

#### MarkFL

##### Super Moderator
Staff member
Beautyfull! Mark, you should take the "Amazon Test": you'll ace it!
I'd like to take credit for seeing the trick here, but I did a search for "catenary" at MHB and found this exact same problem posted in 2013.

#### Jomo

##### Elite Member
Well, hello to you too!

Are you asking what the shape of the cable is?
If so, go here:
I am impressed (OK shocked) that you know what a Catenary is.

#### Denis

##### Senior Member
I'll never cease to amaze you...