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If the area of a square increases by , then the side of a square increases by:
(a)
(b)
(c)
(d)
(e)

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Important Questions on Area of Plane Figures
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In the area of a circle decreases by , then the radius of a circle decreases by:

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The side of a rhombus is metre and length of one of its diagonals is metre. The area of the rhombus is:

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How many plants will be there in a circular bed whose outer edge measure , allowing for each plant?

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The area of a rectangular field is . If the length had been metre more, the area would have been more. The original length of the field is:

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When the circumference and area of a circle are numerically equal, then the diameter is numerically equal to:

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The difference between the circumference and the diameter of a circle is . The area of the circle is:

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When the perimeter and area of a square are numerically equal, then the numerical value of its side is:

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If the ratio of areas of two circles is , the ratio of their circumference is:
