How many degrees will the hour hand move, in the time within which the minute hand moves 240°?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 20°
In 60 minutes the minute hand goes once round the dial (360°), while the hour hand moves only from one number to the next (30°). So the hour hand moves \(\frac{1}{12}\) as far as the minute hand in any period.
Minute hand: 6° a minute, so 240° takes \(240\div6=40\) minutes
Hour hand: 0.5° a minute, so in 40 minutes it moves \(40\times0.5=20^\circ\)