from a square cardboard of side 21cm ,a circle of maximum area is cut out . find the area of the card board left
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74
Side of cardboard = 21 cm
:. radius of circle for its area to be max would be 21/2cm
Area of square= 21*21 = 441cm^2.
Area of circle = (22/7)*(21/2)*(21/2)= 346.185 cm^2
:. the difference = 94.815
:. radius of circle for its area to be max would be 21/2cm
Area of square= 21*21 = 441cm^2.
Area of circle = (22/7)*(21/2)*(21/2)= 346.185 cm^2
:. the difference = 94.815
Answered by
3
Answer:
side-21cm
radius=21/2
area of square=21×21=441cm^2
area of circle=22/7×21/2×21/2=346.185cm^2
area of cardboard left=94.815cm2
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