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Mathematics

In the adjoining figure, OACB is a quadrant of a circle of radius 7 cm. The perimeter of the quadrant is

  1. 11 cm

  2. 18 cm

  3. 25 cm

  4. 36 cm

In the figure, OACB is a quadrant of a circle of radius 7 cm. The perimeter of the quadrant is? Mensuration, ML Aggarwal Understanding Mathematics Solutions ICSE Class 9.

Mensuration

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Answer

Perimeter of quadrant = 2πr4+2r\dfrac{2πr}{4} + 2r

=2×227×74+2×7=444+14=11+14=25 cm.= \dfrac{2 \times \dfrac{22}{7} \times 7}{4} + 2 \times 7 \\[1em] = \dfrac{44}{4} + 14 \\[1em] = 11 + 14 \\[1em] = 25 \text{ cm}.

Hence, Option 3 is the correct option.

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