If for an isosceles triangle the length of each equal side is 'a' units and that of the third side is 'b' units, then its area will be

• 
•  square units.
•  square units
•  square units

The outer and inner diameter of a circular path be 728 metre and 700 metre respectively. The breadth of the path is

• 7 metre

• 28 metre

• 14 metre

• 14 metre

A piece of wire when bent to form a circle will have a radius of 84 cm. If the wire is bent to form a square, the length of a side of the square is 

• 152 cm

• 132 cm

• 168 cm

• 168 cm

If radius of a circle is increased by 5%, then the increase in its area is

• 10.25%

• 10%

• 5.75%

• 5.75%

15.

The area of the parallelogram whose length is 30 cm, width is 20 cm and one diagonal is 40 cm is

• 
• 
• 
• 

On increasing each side of a square by 50%, the ratio of the area of new square formed and the given square will be

• 9 : 5

• 9 : 3.5

• 9 : 7

• 9 : 7

The area of circle is  square cm. The length of its longest chord (in cm) is

• 36

• 28

• 38

• 38

The area of a rhombus is 256 square cm and one of its diagonals is twice the other in length. Then length of its largest diagonal is

• 32 cm

• 16 cm

• 48 cm

• 48 cm

If 
and 
then among the following the relation between m and n holds is

• m - n + 1 = 0

• m + n - 1 = 0

• m + n + 1 = 0

• m + n + 1 = 0

If  the value of  is

• 20

• 5

• 10

• 10