Peshawar in Pakistan and Columbia in SC, USA are at the same latitude #54^o N#. Their longitudes are #71.7^o E and 81.1^o W#. The radius of the Earth at this latitude is nearly 6371 km. How do you find the latitude-circle distance between the two cities?
The radius of the latitude circle of latitude
(Radius of the Earth at latitude
Here, this is
The latitude-circle arcual distance between two places of longitudes
(Latitude circle radius) X (longitude difference
Here, it is