At what time between 3 and 4 o'clock do the minute and hours hands of a clock coincide?
Hour hand starts at 900 and moves 1/2 degree per minute
minute hand starts at 00 and moves 6o per minute
90 + 1/2x = 6 x where x is minutes after 3:00
90 = 5 1/2x
x = 16.37 minutes
3:16: 22