Question

Give the geographical reason for the following : standard time should be divisible by 7 1/2 degree

Answer 1

Explanation:

The rotation of the earth of 360 deg is covered in 24 hours.

1 hour represents 360/24 = 15 deg.

So every 30 minute is equivalent 7.5 deg or 7 deg and 30 min.

The standard meridian of all countries is taken as the nearest longitude which is a multiply of 7.5 deg to make it easy to coordinate with other countries with regards to the time difference between the country and the prime meridian or 0 deg which is the Standard Meridian and passes through Greenwich in England