Q21 The radius of a circle is increased by 33% . Find increase percentage in area of circle.

Q22 What is the area of a semi-circle if area of circle is equal to that of a triangle with sides 9 cm, 21 cm and 20 cm?

Q23 A circle of radius 96 cm has an equilateral triangle inscribed in it. The length of the perpendicular
drawn from the centre to any side of the triangle is?

Q24 Harsh has a circular garden and he is standing at the centre of the garden. He has grown a number of sunflowers in his garden making an equilateral triangle of maximum length. Find the smallest distance such that he can reach to a sunflower if radius of garden is 56m.

Q25 XY and AB are two mutually perpendicular diameters. Find the ratio of area of triangle AXB to area of quadrilateral AXBY.

Q26 Area of square is 169 sq. cm and diameter of cirlce is 1 cm greater than side of square. Find the area of circle.

Q27 The circumference of a circle is 98 cm. Find the side of square inscribed in the circle.

Q28 A rectangle of maximum area is drawn in the circle of area 5388.24
sq.cm.Find the maximum area of the rectangle.

Q29 Find area of largest circle that can be drawn in rectangle of length 39cm and breadth 35 cm.

Q30 If a rectangle of maximum area is inscribed in the circle and area of circle decrases by 10%, find the decrease pecentage in area of rectangle.