The perimeter of the quadrant of a circle of diameter $84 c m$ is _______

150 c m

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120 c m

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21 c m

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42 c m

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Solution

The correct option is A $150 c m$
Given the diameter of circle is 84 cm
Then radius = $\frac{84}{2} = 42 c m$
The perimeter of quadrant = $(\frac{π}{2} + 2) r = (\frac{22}{7 \times 2} + 2) 42 = \frac{50}{14} \times 42 = 150 c m$

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The perimeter of the quadrant of a circle of diameter 84 cm is _______

The correct option is A 150 cmGiven the diameter of circle is 84 cm Then radius =842=42cmThe perimeter of quadrant =(π2+2)r=(227×2+2)42=5014×42=150cm

The perimeter of the quadrant of a circle of diameter $84 c m$ is _______

The correct option is A $150 c m$
Given the diameter of circle is 84 cm
Then radius = $\frac{84}{2} = 42 c m$
The perimeter of quadrant = $(\frac{π}{2} + 2) r = (\frac{22}{7 \times 2} + 2) 42 = \frac{50}{14} \times 42 = 150 c m$