Advertisements
Advertisements
प्रश्न
The radius of a sector of a circle is 7 cm. If the measure of the arc of the sector is 210°, find the area of the sector in case.
Advertisements
उत्तर
The radius of the sector of the circle, r = 7 cm
Measure of arc (θ) = 210°
∴ Area of the sector = `"θ"/360 × πr^2`
`= 210/360 × 22/7 × (7)^2`
`= 7/12 × 22 × 7`
`= 7/6 × 11 × 7`
= 89.83 cm2
APPEARS IN
संबंधित प्रश्न
In Figure , two concentric circles with centre O, have radii 21cm and 42 cm. If ∠ AOB = 60°, find the area of the shaded region. [use π=22/7]
The length of minute hand of a clock is 14 cm. Find the area swept by the minute hand in one minute. (Use π = 22/7)
In circle of radius 6cm, chord of length 10 cm makes an angle of 110° at the centre of circle find Length of arc
The area of a minor sector of a circle is 3.85 cm2 and the measure of its central angle is 36°. Find the radius of the circle.
Choose the correct alternative answer for the following question.
A cone was melted and cast into a cylinder of the same radius as that of the base of the cone. If the height of the cylinder is 5 cm, find the height of the cone.
Find the length of the arc of a circle of diameter 42 cm which subtends an angle of 60° at the centre.
The difference between the circumference and radius of a circle is 37 cm. The area of the circle is
Find the area and perimeter of the circle with the following :
Radius= 10.5 cm
Find the area and perimeter of the following semi-circle :
Diameter= 7 cm
Find the diameter of the sphere for the following :
Volume = `72pi "cm"^3`
The cost of fencing a circular field at the rate of ₹ 240 per meter is ₹ 52,800. The field is to be ploughed at the rate of ₹ 12.50 per m2. Find the cost of pouching the field.
The shaded portion of the figure, given alongside, shows two concentric circles. If the circumference of the two circles is 396 cm and 374 cm, find the area of the shaded portion.
Draw the circumcircle of Δ PMT in which PM = 5.4, P = 60°, M = 70°.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| 7 cm | ...... | ...... |
The area between the circumference of two concentric circles is 2464cm2. If the inner circle has a circumference of 132cm, calculate the radius of the outer circle.
A wire bent in the form of an equilateral triangle has an area of `121sqrt(3)"cm"^2`. If the same wire is bent into the form of a circle, find the area enclosed by the wire.
The radius of a circular plot is 7.7 metres. How much will it cost to fence the plot with 3 rounds of wire at the rate of 50 rupees per metre?
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 70 cm
The cost of fencing a circular race course at the rate of ₹ 8 per metre is ₹ 2112. Find the diameter of the race course
Find the area of the shaded region given in figure
