Home
Class 7
MATHS
Sudhanshu divides a circular disc of rad...

Sudhanshu divides a circular disc of radius `7cm` in two equal parts. What is the perimeter of each semicircular shape disc ? (Use `pi=22/7`)

Text Solution

Verified by Experts

Perimeter of each semicircular disk`(P)` = Circumference of semi circle + diameter of circle
So, `P = pir+d`, where `r` is radius and `d` is diameter.
Here, `r = 7cm` and `d=7**2 = 14cm`
So, perimeter of each semi circular disk will be `36` cm. `:. P = 22/7**7 + 14 = 22+14 = 36cm`
Promotional Banner

Topper's Solved these Questions

  • PERIMETER AND AREA

    NCERT|Exercise EXERCISE 11.2|8 Videos

  • PERIMETER AND AREA

    NCERT|Exercise EXERCISE 11.4|8 Videos

  • LINES AND ANGLES

    NCERT|Exercise SOLVED EXAMPLES|1 Videos

  • RATIONAL NUMBERS

    NCERT|Exercise SOLVED EXAMPLES|6 Videos

Similar Questions

Explore conceptually related problems

What is the circumference of a circular disc of radius 14cm ? (Take pi=(22)/(7))

Rahul divides the length 7 m 8 cm into 3 equal parts. What is the length of each part?

Rahul divides the length 7 m 8 cm into 3 equal parts. What is the length of each part?

Find the perimeter of the given shape (Fig 11.32 (Take (pi)/(22)/7)

If the perimeter of a semicircular park is 360 m, then what is its area? (Take pi = 22/7 )

A board of 7 ft.9 inches long is divided into 3 equal parts.What is the length of each part?

If the measure of sector of a circle with radius 7 cm is 90^@ , what is the perimeter of the sector?

find the circumference of a circle of radius 7 cm. [Take pi=(22)/(7) ]

The perimeter of the sector of circle of radius 10.5 cm is (Take pi = (22)/(7) )

NCERT-PERIMETER AND AREA-SOLVED EXAMPLES
  1. Find BC, if the area of the triangle ABC is 36cm^2 and the height AD ...

    Text Solution

    |

  2. In Delta PQR, PR = 8cm, QR = 4 cm and PL = 5 cm (Fig 11.22). Find: (i...

    Text Solution

    |

  3. Sudhanshu divides a circular disc of radius 7cm in two equal parts. Wh...

    Text Solution

    |

  4. Find the area of a circle of radius 30 cm (use pi=3.14)

    Text Solution

    |

  5. The radius of a circular pipe is 10 cm. What length of a tape is requi...

    Text Solution

    |

  6. Find the perimeter of the given shape (Fig 11.32) (Take pi=22//7)

    Text Solution

    |

  7. Diameter of a circular garden is 9.8 m. Find its area.

    Text Solution

    |

  8. The adjoining figure shows two circles with the same centre. The radi...

    Text Solution

    |

  9. Two cross roads, each of width 5 m, run at right angles through the ce...

    Text Solution

    |

  10. A path 5 m wide runs along inside a square park of side 100 m. Find th...

    Text Solution

    |

  11. A rectangular park is 45 m long and 30 m wide. A path 2.5 m wide is c...

    Text Solution

    |

  12. A door-frame of dimensions 3m×2m is fixed on the wall of dimension 10m...

    Text Solution

    |

  13. Anu wants to fence the garden in front of her house (Fig 11.5), on th...

    Text Solution

    |

  14. The area of a rectangular sheet is 500m^2. If the length of the sheet ...

    Text Solution

    |

  15. The area of a square and a rectangle are equal. If the side of the sq...

    Text Solution

    |

  16. A wire is in the shape of a square of side 10 cm. If the wire isreben...

    Text Solution

    |

  17. Find the height ‘x’ if the area of the parallelogram is 24 cm^2 and t...

    Text Solution

    |

  18. One of the sides and the corresponding height of a parallelogram are ...

    Text Solution

    |

  19. Find the area of the following triangles (Fig 11.20).

    Text Solution

    |

  20. The two sides of the parallelogram ABCD are 6 cm and 4 cm. The height...

    Text Solution

    |