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A square water tank has its side equal to 40 m. There are four semi-circular grassy plots all round it. Find the cost of turfing the plot at Rs 1.25 per square metre `(T a k e\ \ pi=3. 14)`

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RD SHARMA ENGLISH-AREAS RELATED TO CIRCLES-All Questions
  1. A road which is 7 m wide surrounds a circular park whose circumfere...

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  2. Four equal circles, each of radius a , touch each other. Show that the...

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  3. A square water tank has its side equal to 40 m. There are four semi...

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  4. Prove that the area of a circular path of uniform width h surroundi...

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  5. Find the area of Figure, in square cm, correct to one place of decim...

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  6. In Figure, A B and C D are two diameters of a circle perpendicular t...

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  7. In Figure, O A C B is a quadrant of a circle with centre O and rad...

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  8. Find the area of the shaded region in Figure, if A C=24\ c m , B C=10\...

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  9. In Figure, O A B C is a square of side 7 cm. If O A P C is a quadr...

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  10. A regular hexagon is inscribed the circle. If the area of hexagon i...

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  11. A path of width 3.5 m runs around a semi-circular grassy plot whose...

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  12. A child makes a poster on a chart paper drawing a square A B C D of ...

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  13. Three circles are placed on a plane in such a way that each circle ...

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  14. The diameters of front and rear wheels of a tractor are 80 cm and 2m r...

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  15. Find the area of the circle in which a square of area 64\ c m^2 is ...

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  16. The diameter of a wheel of a bus is 90 c m which makes 315 revolutions...

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  17. In Figure, O E=20\ c m . In sector O B F T , square O E F G is inscr...

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  18. In Figure, O is the centre of circle of radius 28 cm. Find the area ...

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  19. In Figure, P Q R S is a square of side 4 cm. Find the area of the sh...

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  20. A circle is inscribed in an equilateral triangle A B C of side 12 ...

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