Question

In $30$ minutes, the hours hand of a clock turns through:

• A. $\pi /6$ radians
• B. $\pi /12$ radians
• C. $\pi /24$ radians
• D. $\pi$ radians

Answer 1

Answer: (B)

$\pi /12$ radians

In 60 mins. the hours hand of a clock turns through $\frac{2\pi }{12}$ radians

$\therefore$ in 30 mins, the hours hand of a clock turns through $\frac{2\pi \times 30}{12\times 60}$ radians

=$\frac{\pi }{12}$ radians