Q. 114.6( 159 Votes )
Radius of circle is 7 cm.
Diameter of the circle is 14 cm.
As 3 circles are there on one side of the square.
The side of the square will be 14 × 3 = 42 cm
Area of square = (Side)2
= 1764 cm2
Area of each circle = πr2
= × (7)2
= 154 cm2
Area of 9 circles = 9 × 154
= 1386 cm2
Area of the remaining portion of the handkerchief = 1764 - 1386
= 378 cm2
Rate this question :
If the total surface area of a solid hemisphere is 462 cm2, find its volume. [Take π = 22/7Mathematics - Board Papers
Find the area of a rhombus each side of which measurers 20 cm and one of whose diagonals is 24 cm.RS Aggarwal - Mathematics
The diagonals of a rhombus are 48 cm and 20 cm long. Find the perimeter of the rhombus.RS Aggarwal - Mathematics
Find the area of a rhombus whose diagonal are 48 cm and 20 cm long.RS Aggarwal - Mathematics
In a four sided field, the length of the longer diagonal is 128 m. The lengths of perpendiculars from the opposite vertices upon this diagonal are 22.7 m and 17.3 m. Find the area of the field.RS Aggarwal - Mathematics
The length of the diagonal of a square is 24 cm. Find its area.RS Aggarwal - Mathematics
One side of a rectangle is 12 cm long and its diagonal measures 37 cm. Find the other side and the area of the rectangle.RS Aggarwal - Mathematics
A room 4.9 m long and 3.5 m broad is covered with carpet, leaving an uncovered margin of 25 cm all around the room. If the breadth of the carpet is 80 cm, finds its cost at RS. 80 per metre.RS Aggarwal - Mathematics
On increasing the length of a rectangle by 20% and decreasing its breadth by 20%, what is the change in its area?RS Aggarwal - Mathematics