Question

2. If it is 6:00 a.m. at Greenwich Meridian there will be 3p.m.
on 120 degree east longitude.
true or false if false then correct it ​

Answer 1

There are 24 hours per day, so in one hour the earth rotates 1/24th of the way around. 360 degrees divided by 24 gives an angle measure of 15 degrees per hour of time.

Longitude line measurements start with the north-to-south line that goes through Greenwich, and measure in positive numbers to 180 degrees eastward to the other side of the globe, and measures from Greenwich in the negative direction westward to that same other side of the globe.

This might be enough info to figure any question along these lines. Good luck.