The length and breadth of a rectangular field are in the ratio 7 : 4. A path 4 m wide running all around outside has an area of 416m2. The breadth (in m) of the field is
A path of uniform width runs round the inside of a rectangular field 38 m long and 32 m wide. If the path occupies 600m2 , then the width of the path is
The area of a circle is increased by 22 cm2 when its radius is increased by 1 cm. The original radius of the circle is
The circumference of a circle is 11 cm and the angle of a sector of the circle is 60°. The area of the sector is
The area of a sector of a circle is 616 cm2 with a central angle of 10°. The radius of the circle is ______. (use π = )
As shown in the given figure, inside the large semicircle, two semicircles (with equal radii) are drawn so that their diameters all sit on the large semicircle's diameter. What is the ratio between the red and blue areas?