Question

calculate the longitude of the position of a ship was navigating officer observed that GMT is 17.15 hours when the local time is known show your working​

Answer 1

Answer:

Time at Greenwich=7:30pm

Greenwich is the 0°longitude

Tim at give place=12pm

Difference between the time at both places=7

house 30mins

since the time at give place is less then that at the Greenwich meridian, the place is to the west of it.

it takes 4 minutes of the earth to cover 1°

therefore, it will take 60mins(1hour) to cover 15°

So, the earth will cover 112.5° (15×7.5) in 7.5 hours

Thus the location of the place is 112.5° West