Diameters of two circles are 12 and 5 respectively, what is the average of their areas?
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Diameter of 1st circle = 12
radius = 6
Area of 1st circle = 3.14×6×6
= 113.04 ........(1)
Diameter of 2nd circle = 5
radius = 5/2 = 2.5
Area of 2nd circle = 3.14×2.5×2.5
= 19.625 ......... (2)
Average (total) of their areas = 1st circle + 2nd circle
from equ. (1) and (2)
= 113.04 + 19.625
= 132.665
radius = 6
Area of 1st circle = 3.14×6×6
= 113.04 ........(1)
Diameter of 2nd circle = 5
radius = 5/2 = 2.5
Area of 2nd circle = 3.14×2.5×2.5
= 19.625 ......... (2)
Average (total) of their areas = 1st circle + 2nd circle
from equ. (1) and (2)
= 113.04 + 19.625
= 132.665
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