Question

Find the area of circle if diameter is 0.7 cm

Answer 1

Answer:

diameter = 0.7 cm

therefore area of circle is 0.38m2

Answer 2

$diameter = 0.7 \\ radius (r)= \frac{0.7}{2} = \frac{7}{20} \\ area = \pi {r}^{2} \\ \frac{22}{7} \times ( { \frac{7}{20} })^{2} \\ = \frac{22}{7 } \times \frac{7 \times 7}{20 \times 20} \\ = \frac{77}{200} \\ = .385 \\ = .39$

hope it is helpful for you