The length of the minute hand of a clock is 12 cm, then the area covered by minute in one minute will be-

Explanation

The angle subtended by the min. hand of the clock in One minutes = $6^\circ$ $\therefore$ Area covered by min. hand in one minute = $\frac{\pi r^2 \theta}{360^\circ}$ = $\frac{22}{7} \times \frac{12 \times 12 \times 6^\circ}{360^\circ} cm^2$ = $\frac{22}{7 \times 60} \times 144 cm^2$ = $\frac{11 \times 72}{7 \times 15} \Rightarrow 7.54 cm^2$