Find the distance in kilometers between the following pair of cities, assuming they lie on the same north-south line. The radius of the Earth is approximately 6400 km. City A, 35 degrees N, and City B, 19 degrees S.

The distance is 6028 km between city A and B.

Step-by-step explanation:

First we will find the arc in degrees which is covered by the cities.

City A = 35 deg north

City B = 19 Deg South

The arc between the cities  = 19 + 35 = 54 degrees

converting it into Rad

Arc = ( π / 180) x 54

Arc = 0.942 rad

Now the distance is calculated by

S = R x α

S = 6400 x 0.942

S = 6028 km