Maths

A sector of a circle of radius 7cm subtending an angle of 270 degree at centre of the circle is use to form a cone?
(A)find the base radius of the cone.
(B)calculate the area of the base of the cone.

  1. 👍
  2. 👎
  3. 👁
  1. Angle/360=length Of An Arc/pi*diameter

    1. 👍
    2. 👎
  2. what is the answer

    1. 👍
    2. 👎
  3. it is very important for me

    1. 👍
    2. 👎
  4. Yes

    1. 👍
    2. 👎
  5. Solve

    1. 👍
    2. 👎
  6. 270/360 *2*22/7*7=33
    2πr=33
    2*22/7=33
    44/7*x=33
    X=33*7/44
    X=5.25

    1. 👍
    2. 👎
  7. 270/360

    1. 👍
    2. 👎
  8. (b)
    πr^2
    =22/7×21/4×21/4
    =693/8cm^2 ~87cm^2

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. maths

    calculate the area of a sector of a circle which subtends an angle of 45° at the centre of the circle, radius 14cm

  2. Math

    A quarter-circle with radius $5$ is drawn. A circle is drawn inside the sector, which is tangent to the sides of the sector, as shown. Find the radius of the inscribed circle. The rest is in asymptote size( 100 ) ; // Not to

  3. math

    the area of a circle PQR with centre O is 72 cm square. what is the area of sector POQ if angle POQ is equal to 40 degree?

  4. Mathematics

    A sector of a circle of radius 7cm subtends angle 270° at the centre. Calculate a. Length of arc b. Area of sector c. Perimeter of sector

  1. Mathematics

    A sector of a circle of radius 8cm is bent to form a cone.find the radius of the cone and its vertical angle if the angle subtended at the centre by the sector is 280

  2. maths

    A sector of a circle of a radius 6cm subrends angle of 105 at the centre of a circle.calculate the perimeter of the sector and the area of the sector?

  3. Math

    A sector of radius 14 cm subtend an angle of 240 degree at the center of the circle is bent to form a cone calculate the base radius of the cone

  4. Maths

    A sector of a circle of radius 8cm is bent to form a cone. Find the radius of the cone and it's vertical angle if the angle substended at the centre by the sector is 280°

  1. maths

    Calculate the arc length that subtends an angle of 55 degree at the centre of a circle with radius r = 5cm.

  2. math

    A sector of a circle subtending an angle 300 degrees at the centre is used to form a cone with base radius 6cm. Find the (a.)radius of the circle (b.)volume of the cone (c.)area of the minor sector of the circle

  3. Physics

    The angle of a sector of a circle is 75 If the radius of this circle is increasing at the rate of 0.3cm/s find the rate of increase of the area when the radius is 6cm

  4. Mathematics

    A sector of a circle radius 8cm subtends and and angle 90°a at the centre of a circle. If the sector is folded without overlap to form the curved surface of a cone, find the 1. Base radius 2. Height 3. Volume of the cone.

You can view more similar questions or ask a new question.