Question

answer in brief if it is 12 noon at 60 degree east longitude then explain what will be the time at 30 degree West longitude

Answer 1

Exactly! So in one hour, the earth turns 1/24th of a complete rotation or 15 degrees! Now you remember longitude, Lou. Going right around the earth, from east to west for example, there are 360 degrees of longitude. So, here's another way of putting it: in one hour, the earth turns through 15 degrees of longitude! (That's the yellow arc between the two pink longitude lines that are 15° apart!)!"