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The angle of a sector of a circle is 90. The ratio of the area of the sector and that of the circle is ______.

A

4:1

B

3:1

C

1:4

D

3:1

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Text Solution
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The correct Answer is:C


Area of circle=πr2
Area of sector=90360×πr2
The required ratio =90360×πr2:πr214:1
1:4

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Updated on:21/07/2023

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Knowledge Check

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    The angle of a sector of radius 14 cm is 90. The area of the sector is ________.

    A144cm2
    B154cm2
    C162cm2
    D196cm2
  • Question 1 - Select One

    The angle of a sector of radius 14 cm is 90. The area of the sector is ________.

    A144 cm2
    B154 cm2
    C162 cm2
    D196 cm2
  • Question 1 - Select One

    The angle of a sector of a circle is 108 and radius of the circle is 15 m. The ratio of the circumference of the circle and the length of the arc of the sector is _______

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    B10:3
    C1:3
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    The angle of a sector of a circle is 108 and radius of the circle is 15 m. The ratio of the circumference of the circle and the length of the arc of the sector is _______

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  • Question 1 - Select One

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    The angle of a sector of a circle is 72 and radius of the circle is 10 m. The ratio of the circumference of the circle and the length of the arc of the sector is ________.

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