Question

find the area of the following figure ​

Answer 1

Answer:

are of circle = pie r²

d=42

r=21

22/7×21×21 = 1386mm²

Answer is 1386 mm²

Answer 2

${r}^{2} \pi = {42}^{2} \times \frac{22}{7} = 42 \times 42 \times \frac{22}{7} = 6 \times 42 \times 22 = 5544mm$

that's is your answer