0
The Archery board has 5 concentric ring of equal thickness and the blue ring is the central ring.
So if we take the thickness of each ring as 1 unit then using the formula for area of a circle, A = (pi) * r^2, the total area of the board is given by (pi)*5^2 which is 25pi.
To find the area of the blue annulus we can think of it as a circle with a circular hole cut in the middle so the area is (pi)*3^2 - (pi)*2^2. Which is 9pi - 4pi equal to 5pi.
So if the blue area is 5pi and the total area is 25pi then 1/5 or 20% of the board is blue.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What are the colors on a archery board?
Working from the centre outwards, the colours are: Gold (Yellow) Red Blue Black White An image of a standard archery face can be found at: http://upload.wikimedia.org/wikipedia/commons/d/d5/Archery_Target_80cm.svg
What is arrangement of rings in archery target?
Starting from the outside. White, Black, Blue, Red, Gold
Is hockey India's indigenous sport?
No, it isn't. Sports that are indigenous to India include archery, kho-kho, and board games.
What is the percentage of increment for CBSE teacehrs?
percentage of increment of cbse board
What is frank Sinatra's nickname?
Ole Blue Eyes, and the Chairman of the Board
Frank Sinatra Nickname?
Old Blue Eyes or the Chairman of the Board.
What do people shoot arrows at?
Archery, and some types of hunting.
How do you get the blue and yellow board on Fantage com?
What is the board look like because there are many boards yellow and blue on fantage.
What is the percentage of methylene blue in lactophenol cotton blue?
0.05%
How do you convert percentile into percentage in cbse board exam?
only concerned board can provide the data
What is sky archery?
sky archery was a brand of archery like a sky conquest
How do you color a school board with a blue crayon?
You take the crayon and you press it agianst the board and then you take it back and forth and the blue magically appears.
