Problem 121. surface of a spherical planet

you just discovered its circumference, that is the input.

Solve

Last solution submitted on Sep 11, 2019

William Smith on 25 Sep 2012

I think the problem should be called 'surface AREA' of a spherical planet.

Sam on 23 May 2012

Aurelien Queffurust on 13 Feb 2012

I need to remember that using 0.31830988618379067154 is less expensive (size 14) than using 1/pi (size 15) ;)

Yvan Lengwiler on 1 Mar 2012

Yeah. But this is useful only within Cody. For real work it would be crazy to program it this way.

William Smith on 25 Sep 2012

Only if you are writing for a low solution size. There's on penalty for writing for clarity, and it's preferred in the real world...