Area of a Sector
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An umbrella has 8 ribs which are equally spaced. Assuming the umbrella to be a flat circle of radius 45 cm, find the area in cm2 between the two consecutive ribs of the umbrella.
A car is provided with 2 non overlapping wipers. The structure of each wiper is as shown in the figure. The brown blade actually wipes the glass sweeping through an angle of 120∘. If the length of the wiper is 35 cm and length of the blade is 28 cm, find the total area(in cm2) cleaned for each sweep.
How would you go about finding the area of the major sector?
Area of circle - Area of minor sector
Area of circle + Area of minor sector
Perimeter of the minor sector x radius
Perimeter of major sector x perimeter of minor sector
Area of a sector of angle p (in degrees) of a circle with radius R is
Find the area of the shaded region (in cm2) as shown in figure of the two concentric circles with centre O and radius 7 cm and 14 cm respectively. Given ∠AOC = 40∘.
(use π = 227)
42.1 cm2
51.32 cm2
67.8 cm2
96.5 cm2
The figure consists of 3 semicircles and an equilateral triangle of side 7 cm. Find the area of the entire figure.
78.94 cm2
252.19 cm2
134.75 cm2
253.25 cm2
Figure depicts a racing track whose left and right ends are semi-circular. The distance between the two inner parallel line segments is 60 m and they are each 106 m long. If the track is 10 m wide, find the area of the track (in m2).
Find the area of the shaded region where ABC is a quadrant of radius 5 cm and a semicircle is drawn with BC as diameter.
12.5 cm2
7.14 cm2
19.64 cm2
8.8 cm2
Find the area of the sector in a clock swept by the minute hand in five minutes if the radius is 14 cm.
(Take π as 227)
616 cm2
- 51.33 cm2
- 42 cm2
- None of the above
In the figure, two small circles touch each other externally at the centre of a bigger circle and these small circles are touched internally by a bigger circle with radius 4 cm. Find the area of the shaded region in cm2.
27
30
22
35