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Tick the correct answer in the following and justify your choice : If the perimeter and area of a circle are numerically equal, then the radius of the circle is

A

2 units

B

`pi` units

C

4 units

D

7 units

Text Solution

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The correct Answer is:
B
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NAND LAL PUBLICATION-AREAS RELATED TO CIRCLES -EXERCISE 12.3
  1. Tick the correct answer in the following and justify your choice : If ...

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  2. Find the area of the shaded region in Fig., if PQ = 24 cm, PR = 7 cm a...

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  3. Find the area of the shaded region in Fig. 12.20, if radii of the two ...

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  4. Find the area of the shaded region in fig, if ABCD is a square o fside...

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  5. Find the area of the shaded region in fig., where a circular arc of ra...

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  6. From each corner of a square ofside 4 cm a quadrant of a circle of rad...

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  7. In a circular table cover of radius 32cm, a design is formed leaving a...

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  8. In fig., ABCD is a square of side 14 cm. With centres A, B, C and D, f...

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  9. Figure depicts a racking track whose left and right ends are semicircu...

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  10. Figure depicts a racking track whose left and right ends are semicircu...

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  11. In Fig. 12.27, AB and CD are two diameters of a circle (with centre O)...

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  12. The area of an equilateral triangle ABC is 17320.5 cm^(2). With each v...

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  13. On a square handkerchief, nine circular designs each of radius 7 cm ar...

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  14. In figure, OACB is a quadrant of a circle 3.5 cm. OD = 2 cm, find the ...

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  15. In figure, OACB is a quadrant of a circle 3.5 cm. OD = 2 cm, find the ...

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  16. In Fig. 12.31, a square OABC is inscribed in a quadrant OPBQ. If OA = ...

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  17. AB and CD are respectively arcs of two concentric circles of radii 21 ...

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  18. In fig., ABC is a quadrant of a circle of radius 14 cm and a semi circ...

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  19. Calculate the area of the designed region in fig. common between the t...

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