If you travel westward along the 80th parallel north of the equator from the International Date Line to 150 degree East longitude, how far have you gone in both degrees of longitude and miles?

Question

Several sites calculate this distance. Check them out.

http://www.wcrl.ars.usda.gov/cec/java/lat-long.htm

http://www.nhc.noaa.gov/gccalc.shtml

http://www.indo.com/cgi-bin/dist?place1=80%3A00%3A00N++180%3A00%3A00W&place2=80%3A00%3A00N++150%3A00%3A00W

i did not get it yet