Two cities whose longitudes are 10°E and 20°W on the equator are apart?

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.