A square ABCD is inscribed in a circle of unit radius. Semi-circles are described on each side as a diameter. The area of the region bounded by the four semi-circles and the circle is

• 1 sq unit

• 2 sq unit

• 1.5 sq unit

• 2.5 sq unit

The sides of a triangle having area 7776 sq cm are in the ratio 3 : 4 : 5. The Perimeter of the triangle is

• 412 cm

• 424 cm

• 400 cm

• 432 cm

If the area of a circle is A, radius of the circle is r and circumference of it is C, then

• rC = 2A

• 

• 

• 

The perimeter of one face of a cube is 20 cm. Its volume will be

• 400 cm³

• 125 cm³

• 625 cm³

• 100 cm³

A solid sphere of diameter 17.5 cm is cut into two equal halves. What will be the increase (in cm²) in the total surface area?

• 289 cm²

• 361.5 cm²

• 481.25 cm²

• 962.5 cm²

What is the area (in cm²) of a rectangle if its diagonal is 25 cm and one of its sides is 24 cm?

• 186 cm²

• 144 cm²

• 132 cm²

• 168 cm²

Area of 4 walls of a cuboid is 57m², if its length is 5.5 m and height is 3 m. What is the breadth (in m)?

• 4.5 m

• 4 m

• 3 m

• 3.5 m