Question

Calculate the time at Durban (longitude 30 degree E) when the time is 7:00a.m. at New York (75 degree W )

Answer 1

so 75 degree means 15 * 5
75 degree = 5 hour
now time at gmt will be (7-5) = 2 am
30 degree = 2 hour (15*2)
time at durban = (2-2) = 12 midnight