Advertisements
Advertisements
рдкреНрд░рд╢реНрди
Find the area of circle whose circumference is 44 cm.
рдЙрддреНрддрд░
Circumference = 44 cm
Let radius = r cm
Circumference = 2 × r = 44 cm
`2 × 22/7 × r= 44`
`r = (44×7)/(2×22) = 7`ЁЭСРЁЭСЪ
radius = 7 cm
Area of circle = ЁЭЬЛr2
`= 22/7 × 7 × 7 = (22 × 7) = 154`ЁЭСРЁЭСЪ2
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди
A sector is cut from a circle of radius 21 cm. The angle of the sector is 150º. Find the length of its arc and area.
The area of circle, inscribed in equilateral triangle is 154 cms2. Find the perimeter of
triangle.
In the given figure,
\[\square\] PQRS is a rectangle. If PQ = 14 cm, QR = 21 cm, find the areas of the parts x, y, and z.

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 side of a square is 10 cm. Find the area of the inscribed circle [π = 3.14]
Diameter of the circular garden is 42 m. There is a 3.5 m wide road around the garden. Find the area of the road.
Find the circumference of the circle whose area is 81π cm 2.
Find the area of a circular field that has a circumference of 396m.
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.
The circumferences of two circles are in the ratio 4 : 5. What is the ratio of their radii?