How far will the tip of a 2cm-long minute hand of a clock move in 45 minutes?
Answer & explanation
Correct answer: option 2
Angle traced by the tip in 60 minutes = 2\(\Pi \)
In 45 minutes = 2\(\Pi \)/60 x 45 = 3\(\Pi \)/2
L = r x \(\theta \)
L = 2 x 3\(\Pi \)/2 = 3\(\Pi \)