Area Problems
In a circle of radius 21 cm an arc subtends an angle of 72° at the centre. The length of the arc is?

13.2 cm
26.4 cm
21.6 cm
19.8 cm

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Area Problems
The perimeter of an isosceles triangle is equal to 14 cm . The lateral side is to the base in the ratio 5 : 4 the area of the triangle is?

2?21 cm2
1/2?21 cm2
?212
3/2?21 cm2

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Area Problems
The radius of a circle is increased so that its circumference increase by 5%. The area of the circle will increase by?

10.25 %
10 %
8.75 %
10.5 %

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