the ratio between the radii of two circles is 5:7 find the ratio between the area
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The answer is 25: 49 ok
ghostrider3:
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Given:
Ratio of radii of 2 circles is 5:7
Area of a circle = πr²
Let the radii be of length 5a and 7a
The area of 1st circle = π x 5a x 5a
= 25πa²
The area of 2nd circle = π x 7a x7a
= 49πa²
Therefore the ratio of the 2 circles = 25πa²:49πa²
= 25:49
Hope this helps.....
Ratio of radii of 2 circles is 5:7
Area of a circle = πr²
Let the radii be of length 5a and 7a
The area of 1st circle = π x 5a x 5a
= 25πa²
The area of 2nd circle = π x 7a x7a
= 49πa²
Therefore the ratio of the 2 circles = 25πa²:49πa²
= 25:49
Hope this helps.....
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