If the time at village A (75°W) is 5:00 pm on Friday, calculate the time & day at village B (120°E).

The longitudinal difference between village A and village B is: 120° + 75° = 195° (as different hemisphere).

For 1° longitudinal difference time is 4 minutes.

So, for 195° longitudinal difference the time difference is: 195° x 4 = 780 minutes or 13 hours.

As village B is situated in the east of village A, its local time will be ahead the time of village A.

The local time of village B will be: 5pm + 13 hours = 6 a.m. on Saturday.