What is the equivalent of 0°48' in time units?

Correct Answer: Option D — 3 min. 12 sec.

Converting arc to time uses the standard rate of 15 degrees per hour, or 4 minutes of time per degree and 4 seconds per minute of arc. Thus, 48 minutes of arc multiplied by 4 seconds equals 192 seconds, or 3 minutes and 12 seconds.