Advertisements
Advertisements
Question
Find the area of a circular field that has a circumference of 396m.
Advertisements
Solution
The Circumference of a Circle with radius r = 2πr
Here, Circumference of a Circle = 369
⇒ 2πr = 396
⇒ r = `(396)/(2pi)`
= `(396 xx 7)/(2 xx 22)`
= 63m
The Area of a Circle with radius r = πr2
⇒ The Area of a Circle with radius 63m
= π(63)2
= `(22)/(7) xx (63)^2`
= `(22)/(7) xx 3969`
= 12,474m2.
APPEARS IN
RELATED QUESTIONS
In figure, ΔABC is an isosceles triangle with perimeter 44 cm. The base BC is of length 12 cm. Side AB and side AC are congruent. A circle touches the three sides as shown in the figure below. Find the length of the tangent segment from A to the circle.
The minute hand of a clock is 10cm long. Find the area of the face of the clock described by the minute hand between 9 A.M. and 9.35 A.M.
Find the angle subtended at the centre of circle of radius 5cm by an arc of length `((5pi)/3)` cm
In circle of radius 6cm, chord of length 10 cm makes an angle of 110° at the centre of circle find The area of sector
A playground has the shape of rectangle, with two semicircles on its smaller sides as diameters, added to its outside. If the sides of rectangle are 36m and 24.5m. find the area of playground.
Find the length of the arc of a circle of diameter 42 cm which subtends an angle of 60° at the centre.
A race track is in the form of a rig whose inner circumference is 352 m and outer circumference is 396 m. Find the width and the area of the track.
The areas of two circles are in the ratio 9 : 4. The ratio of their circumferences is
The circumference of a circle is 22 cm. Find its area.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| 7 cm | ...... | ...... |
