Teaser #7

[empip]

Two spheres A and B.

A French Sphere A has a diameter of 10,000 metres

An American Sphere B has a diameter of 3 ft 7.5 ins.

A seperate piano wire is drawn out around each sphere no kinks or stretching etc.
A plane cuts the centre of each sphere and contains the centre lines of the wires.
Each wire has it's centre line precisely 1 foot above the surface of it's own sphere.

How much does each piano wire vary in length along its center line from the circumference of the sphere it encircles?

http://xs303.xs.to/xs303/06293/2Spheres.jpg 2Pi ft or 6.28 ft

 

[johnb80]

Circumference = pie D therefore one half of pie D = 3.1415927 x 1' /2 or 1.57079635'

 

[empip]

Nah ! Incorrect answer.

 

[bethrob99]

pie x 1ft?

Please Sir, I don't understand the question

 

[Softus]

Pi'.

 

[johnny_t]

Is the plane that cuts each sphere launched from a conveyor belt or a runway ??

 

[empip]

All incorrect.
The answer is alongside in the question.

 

[bethrob99]

BALLS!

 

[empip]

BALLS!

Your answer was in the plural and maybe they bounce !

 

[bethrob99]

football?

 

[vokera80e]

Now why would he pull his tongue out..

 

[keyplayer]

Sphere A = 1.9154 m.

Sphere B = 75 6/4 inches.

 

[johnny_t]

6.28 feet, more or less, no ?

EDIT: Which looks more or less what KeyPlayer just said.....

 

[vokera80e]

american=12"

french=30.5 centimetres.

 

[empip]

Answer



So diff, wire length minus sphere circumference, is
2*Pi*height ( height units ) above surface.