Angles of a quadrilateral are in the ratio 3:4:5:8. The smallest angle is

• 54o

• 72o

• 36o

• 36o

If the ratio of the areas of two squares is 25:36, then the ratio of their perimeters is

• 5:6

• 25:36

• 6:5

• 6:5

3.

If the volume of a sphere is divided by its surface area, we obtain 27 cm. The radius of the sphere is

• 9 cm.

• 81 cm.

• 27 cm.

• 27 cm.

Diagonals of a rhombus are 1 meter and 1.5 meter in lengths. The area of the rhombus is

• 0.75 m2

• 0.45 m2

• 0.78 m2

• 0.78 m2

An angle in a semi circle is

• π

• n/4

• n/2

• n/2