How long will it take for the minute hand to rotate 120 °?

univerkov | May 14, 2021 | education

360 ° is a full turn of the watch hand.
1) 360: 12 = 30 ° – this is 1 sector that the arrow passes every 5 minutes;
2) 120: 30 = 4 – the arrow must go through the sector at 120 °;
3) 4 * 5 = 20 minutes – the hand will turn by 120 °.
Answer: in 20 minutes the hand will turn 120 °.

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