Question

The+length+of+the+minute+hand+of+a+clock+is+7cm.find+the+area+swept+by+it+in+one+hour

Answer 1

$area \: \: swept \: = \pi {r}^{2} \: \\ \\ \\ = \frac{22}{7} \times {7}^{2} \\ = 22 \times 7 \\ = 154 \: {cm}^{2}$

The answer is 154 cm sq.