Time is GOLD
Algebra
Level
2
At what time after 12:00 noon will be the hour hand and minute hand of the clock first form an angle of 120˚
12:18.818
12:20.818
12:21.878
12:21.818
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1 solution
The speed of hour hand = 30ᵒ/h or 0.5ᵒ/min. The speed of minute hand = 360ᵒ/h or 6ᵒ/min. So the time after 12:00 is x + 12:00, where 6x – 0.5x = 120, so x= 21.818