In an ordinary clock, the minute hand would have moved how many degrees over a period of exactly 2 hours and 20 minutes?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 840 degrees
The minute hand goes once round the dial, 360° in 60 minutes, so it turns \(\frac{360}{60}=6^\circ\) every minute.
2 hours 20 minutes \(=140\) minutes
Angle turned \(=140\times6^\circ=840^\circ\), that is, two full turns (720°) and 120° more
