From NOAA: According to the U.S. Geological Survey, there are over 332,519,000 cubic miles of water on the planet. A cubic mile is the volume of a cube measuring one mile on each side. Of this vast volume of water, NOAA's National Geophysical Data Center estimates that 321,003,271 cubic miles is in the ocean. R_e ~ 6371 km. V_ocean ~ 1.33799*10^9 km^3. V / (4*pi*r^2) ~ 2.62318 km. (barring arithmetical errors). That is small enough so that correcting for the earth being curved will not substantially change the answer. The Challenger Deep is ~ 11 km deep.

BC -----Original Message----- From: math-fun [mailto:math-fun-bounces@mailman.xmission.com] On Behalf Of Marc LeBrun Sent: Wednesday, January 11, 2017 11:18 PM To: math-fun <math-fun@mailman.xmission.com> Subject: [EXTERNAL] [math-fun] terrestrial estimation question Were the Earth smoothed, preserving volume, how deep would the ocean be? _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun