Areas Related to Circles

Bihar Board Class 10 · Mathematics · 33 past questions

1. Q1 2026

   If the area of an equilateral triangle is $36\sqrt{3}$ cm$^2$ then its perimeter is

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2. Q2 2026

   The length of the diagonal of a square is $10\sqrt{2}$ cm; then its area is

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3. Q3 2026

   If the ratio of circumferences of two circles is 3 : 4 then the ratio of their areas is

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4. Q4 2026

   The value of central angle of a sector is $60^\circ$ and radius is 21 cm. Then the length of the arc is

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5. Q5 2026

   Perimeter of semicircle is

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6. Q6 2026

   Circumference of the circle having diameter 28 cm is

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7. Q7 2026

   The perimeter of a sector of a circle of radius 14 cm is 50 cm ; then central angle of the sector is

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8. Q8 2026

   A wire is looped in the form of a circle of radius 28 cm. It is rebent into a square form, then the length of…

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9. Q9 2026

   The area of a circle is the same as the area of a square. Then the ratio of their perimeters is

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10. Q10 2025

    The ratio of the radii of two circles is 3 : 4 ; then the ratio of their areas is

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11. Q11 2025

    The area of the sector of a circle of radius 42 cm and central angle 30° is

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12. Q12 2025

    The ratio of the circumferences of two circles is 5 : 7 ; then the ratio of their radii is

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13. Q13 2024

    The ratio of the areas of two circles is $x^2:y^2$. Then the ratio of their radii is

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14. Q14 2024

    The area of a circle is $49\pi$ square cm. Then its diameter is

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15. Q15 2024

    The distance covered by a wheel of radius 14 cm in 5 revolutions is

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16. Q16 2024

    If the area of a circle is equal to the area of a square then the ratio of their perimeters is

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17. Q17 2023

    If the radius of a wheel is $\frac{35}{44}$ metre then the distance covered in 2 revolutions is

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18. Q18 2023

    If O is the centre and r is the radius of a circle and $\angle AOB = \theta$, then the length of arc AB is…

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19. Q19 2023

    If the area of minor sector of a circle with radius 7 cm is 14 square cm, then the area of major sector is

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20. Q20 2023

    The area of a circle is 154 cm$^2$ Then its diameter is

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21. Q21 2023

    The perimeter of a semicircle whose radius is $3r$ is

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22. Q22 2022

    The area of an equilateral triangle with side $a$ is

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23. Q23 2022

    If both the circumference of a circle and the perimeter of a square are equal to 88 cm then

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24. Q24 2022

    If the ratio of the area of two circles is $4:25$ then the ratio of their radii will be

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25. Q25 2022

    If the circumference and the area of a circle are numerically equal, the diameter of the circle will be

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26. Q26 2022

    If the circumference of a circle is $10\pi$ cm, then its area will be

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27. Q27 2022

    The area of a semi-circle of radius 4 cm is

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28. Q28 2020

    The diameter of a circle with area $64\pi$ cm$^2$ is

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29. Q29 2020

    If the circumference of a circle is increased from $2\pi$ to $4\pi$, its area will be

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30. Q30 2019

    The radius of a circle with area 38.5 cm$^2$ is -

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31. Q31 2016

    If the ratio of areas of two circles is $4 : 9$, then the ratio of their radii will be

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32. Q32 2016

    Area of sector of angle $\theta$ will be

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33. Q33 2015

    If the diameter of a semicircle is 14 cm, then its circumference will be

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