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Can anyone please tell me what I’m doing wrong. It’s not giving me the full marks. The marks for this question is 4 but I only got 1.

Can anyone please tell me what I’m doing wrong. It’s not giving me the full marks-example-1
User Lid
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1 Answer

5 votes

Answer:

33%

Explanation:

The area of the entire circle:

The radius is 4+3+3 = 10

Area of a circle= pi * r^2


Area of largest circle = pi * 10^2 = 100 pi


Area of blue ring = Area of blue circle - area of inner white circle

The blue circle has a radius of (4+3) = 7

The inner white circle had a radius of 4

Substituting what we know

Area of blue ring = Area of blue circle - area of inner white circle

= pi * r^2 - pi*r^2

= pi * 7^2 - pi *4^2

= 49pi - 16pi

= 33 pi


The percentage of the logo that is blue is the blue ring/ area of largest circle

percentage = 33 pi/100 pi

Canceling pi

percentage = 33/100

= 33 %

User Hpique
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