The formula of interest is
A = (1/2)r²·θ
You have A = 70 m², θ = 170° = 17π/18 rad. Then the radius is found from
70 m² = (1/2)r²(17π/18)
(36·70 m²)/(17π) = r²
r ≈ √47.18476 m
r ≈ 6.9 m
Can you write it out differently? I don't understand.
You can use proportions.
Milk:
6 is to 2 2/3 as 8 is to x
6/(2 2/3) = 8/x
6/(8/3) = 8/x
6x = 8 * 8/3
6x = 64/3
x = 32/9
x = 3 5/9
Oil:
6 is to 1/4 as 8 is to x
6/(1/4) = 8/x
6x = 1/4 * 8
6x = 2
x = 2/6
x = 1/3
Answer:
Rs. 18000
Step-by-step explanation:
![x(1 + 25\%) \: (1 - 15\%) - x = 900](https://tex.z-dn.net/?f=x%281%20%2B%2025%5C%25%29%20%5C%3A%20%20%20%281%20-%2015%5C%25%29%20-%20x%20%3D%20900)
![1.0625x - x = 900](https://tex.z-dn.net/?f=1.0625x%20-%20x%20%3D%20900)
![0.0625x = 900](https://tex.z-dn.net/?f=0.0625x%20%3D%20900)
![x = 14400](https://tex.z-dn.net/?f=x%20%3D%2014400)
•••••
![14400 \times (1 + 25\%)](https://tex.z-dn.net/?f=14400%20%5Ctimes%20%281%20%2B%2025%5C%25%29)
![\: \: \: \: \: \: \: \: = 14400 \times 1.25](https://tex.z-dn.net/?f=%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%3D%2014400%20%5Ctimes%201.25)
![\: \: \: \: \: \: \: \: =Rs. 18000](https://tex.z-dn.net/?f=%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%3DRs.%2018000)
The marked price of a calculator is ![\boxed{\green{Rs. 18000}}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Cgreen%7BRs.%2018000%7D%7D)
You add the letters with numbers in front for example :
6n +5m +p -5
(The postive and negative 5 dont cancel becayse there isnt a m on the negative)