Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
The radius of the sector of the circle, r = 7 cm
Measure of arc of the sector = θ = 30º
∴ Area of the sector = \[\frac{\theta}{360°} \times \pi r^2 = \frac{30°}{360°} \times \frac{22}{7} \times \left( 7 \right)^2\] = 12.83 cm2
APPEARS IN
संबंधित प्रश्न
The circumference of a circle exceeds the diameter by 16.8 cm. Find the radius of the circle.
A field is in the form of circle. A fence is to be erected around the field. The cost of fencing would to Rs. 2640 at rate of Rs.12 per metre. Then the field is to be thoroughs ploughed at cost of Rs. 0.50 per m2. What is amount required to plough the field?
Four equal circles each of radius a, touch each other. Show that area between them is `6/7a^2`
The area of rhombus is `480cm^2` , and one of its diagonal measures 48 cm. Find
(i) the length of the other diagonal,
(ii) the length of each of the sides
(iii) its perimeter
In the given figure, if A(P-ABC) = 154 cm2 radius of the circle is 14 cm, find
(1) `∠APC`
(2) l ( arc ABC) .
The circumference of a circle is 22 cm. Find the area of its quadrant.
Find the length of the arc of a circle of diameter 42 cm which subtends an angle of 60° at the centre.
The sum of the radii of two circles is 7 cm, and the difference of their circumferences is 8 cm. Find the circumference of the circles.
The area of a circle inscribed in an equilateral triangle is 154 cm2. Find the perimeter of the triangle.
The perimeter of a sector of a circle of radius 5.6 cm is 27.2 cm. Find the area of the sector.
A chord of a circle of radius 30 cm makes an angle of 60° at the centre of the circle. Find the area of the minor and major segments.
Find the total surface area and volume of a hemisphere whose radius is 10 cm.
A solid sphere metal is cut through its centre into 2 equal parts. If the diameter of the sphere is 3`1/3` cm , find the total surface of each part, correct to two decimal places.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | ...... | 72.6 cm |
Find the circumference of a circle whose area is 81πcm2.
The sum of the circumference and diameter of a circle is 176 cm. Find the area of the circle.
In a circle of diameter 42 cm, if an arc subtends an angle of 60° at the centre, where `pi = 22/7` then length of an arc is ____________.
Value of π is ______ approximately.
A circle with radius 16 cm is cut into four equal parts and rearranged to form another shape as shown in the following figure:
Does the perimeter change? If it does change, by how much does it increase or decrease?
ABCD is a given rectangle with length as 80 cm and breadth as 60 cm. P, Q, R, S are the midpoints of sides AB, BC, CD, DA respectively. A circular rangoli of radius 10 cm is drawn at the centre as shown in the following figure. Find the area of shaded portion.
