Let, Fiona's age = x
Darwin's age = 2x+6
Then, 2x+6 = 50
2x = 44
x = 22
So, your answer is 22
Hope this helps!
![\bf \: Circumference \: of \: a \: circle = 2\pi \: r](https://tex.z-dn.net/?f=%20%5Cbf%20%5C%3A%20Circumference%20%5C%3A%20%20of%20%20%5C%3A%20a%20%5C%3A%20%20circle%20%3D%202%5Cpi%20%5C%3A%20r)
![\implies22 = 2 \times \dfrac{22}{7} r](https://tex.z-dn.net/?f=%20%5Cimplies22%20%3D%202%20%5Ctimes%20%20%5Cdfrac%7B22%7D%7B7%7D%20%20r)
![\implies22 = \dfrac{44}{7} \times r](https://tex.z-dn.net/?f=%20%5Cimplies22%20%3D%20%20%5Cdfrac%7B44%7D%7B7%7D%20%20%5Ctimes%20r)
![\implies \: r = \dfrac{22 \times 7}{44}](https://tex.z-dn.net/?f=%20%5Cimplies%20%5C%3A%20r%20%3D%20%20%5Cdfrac%7B22%20%5Ctimes%207%7D%7B44%7D%20)
![\implies \boxed{ r = \dfrac{7}{2} }](https://tex.z-dn.net/?f=%20%5Cimplies%20%5Cboxed%7B%20r%20%3D%20%20%5Cdfrac%7B7%7D%7B2%7D%20%7D)
Now,
![\bf \: Area \: of \: circle = \pi {r}^{2}](https://tex.z-dn.net/?f=%20%5Cbf%20%5C%3A%20Area%20%5C%3A%20%20of%20%20%5C%3A%20circle%20%3D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20)
![\rightarrow \: \frac{22}{7} \times ({ \frac{7}{2}) }^{2}](https://tex.z-dn.net/?f=%20%5Crightarrow%20%5C%3A%20%20%5Cfrac%7B22%7D%7B7%7D%20%20%20%5Ctimes%20%20%28%7B%20%5Cfrac%7B7%7D%7B2%7D%29%20%7D%5E%7B2%7D%20)
![\rightarrow \frac{22}{ \cancel7} \times \frac{ \cancel{49}}{4}](https://tex.z-dn.net/?f=%20%5Crightarrow%20%5Cfrac%7B22%7D%7B%20%5Ccancel7%7D%20%20%5Ctimes%20%20%5Cfrac%7B%20%5Ccancel%7B49%7D%7D%7B4%7D%20)
![\rightarrow \: 22 \times \frac{7}{4}](https://tex.z-dn.net/?f=%20%5Crightarrow%20%5C%3A%2022%20%5Ctimes%20%20%5Cfrac%7B7%7D%7B4%7D%20)
![\rightarrow \: 11 \times \frac{7}{2}](https://tex.z-dn.net/?f=%20%5Crightarrow%20%5C%3A%2011%20%5Ctimes%20%20%5Cfrac%7B7%7D%7B2%7D%20)
![\rightarrow \frac{77}{2}](https://tex.z-dn.net/?f=%20%20%5Crightarrow%20%5Cfrac%7B77%7D%7B2%7D%20)
![\rightarrow \: 38.5 \: cm {}^{2}](https://tex.z-dn.net/?f=%20%5Crightarrow%20%5C%3A%2038.5%20%5C%3A%20cm%20%7B%7D%5E%7B2%7D%20)
Area of rectangle = 38.5 cm².
The answer to this is:
1/14
Answer:
17.5 meters
Step-by-step explanation:
To find how far she walks, multiply 2.5 by 7
2.5(7)
= 17.5
So, in 7 days, she walks 17.5 meters