The minute hand of a clock is 7 cm long. Find the area of the sector made by the minute hand between 7 am and 7.05 am :

Answer: Option B

Angle traced by the minute hand in 5 minutes :
$$\begin{array}{rl}& ={\left(\frac{360}{60}\times 5\right)}^{\circ }\\ & =30^{\circ }\end{array}$$
Area of the sector :
$$\begin{array}{rl}& =\left(\frac{22}{7}\times 7\times 7\times \frac{30}{360}\right)c{m}^2\\ & =12.83c{m}^2\end{array}$$